Magic is a general name for techniques that produce various phenomena via controlling mana, and it is also called “sorcery”, “thaumaturgy”, and so on. Humans who use magic are called “magicians”, “sorcerers”, and “mages”, while monsters who use magic are called “witches”, etc., but these terms are often mixed up.
Formerly, those among humans who used magic were at times respected as sages who commanded power beyond human ken, or saints who embodied the miracles of the gods, but at other times they were also persecuted as heretics who sold their souls to demons or renegades who set foot into the forbidden domain of the gods; thus, they were treated as special beings who were different than ordinary humans much of the time, but, as of the present, the chief god's Order acknowledges the expediency of magicians, and since magic is generally well known and has been promulgated as a scholarly discipline, unlike in the past, it is generally recognized as a category of skills that can be used. On the other hand, among monsters, from past to present, it has been consistently recognized as “one of the powers that can be possessed” much like physical abilities such as brute strength.
The history of magic is ancient. It is regarded as part of the knowledge given to humans by the gods in the age of genesis. Throughout the long history of warfare between humans and monsters, magic has been extensively developed by both primarily as a means of attacking one's enemies, and it has grown increasingly complex with many specializations, but ever since we monsters obtained our current forms, our magical research has been directed towards developing culture and civilization. Among monsters, research into magic for the purpose of obtaining partners and enhancing our sex lives with our partners is also widely and enthusiastically conducted. Magic has become indispensable for us to attain greater heights of pleasure and lead more dissolute, debaucherous lives.
The word “magic” might give you the impression of something difficult, but since it is used by employing the life force that all people possess, anyone can use it so long as they have sufficient intelligence and the proper knowledge, although aptitude varies greatly. Certain races of monsters and humans born with a natural talent for magic may in some cases be able to use magic intuitively even when lacking knowledge, while it has been confirmed that even among plants and animals which lack intelligence, there are some varieties that can put up a fight against enemies by instinctively using magic.
The existence of this world hinges upon the workings of the energy that is the fundamental basis of all life, i.e., mana. It is presumed that god also created this world with a kind of magic utilizing extraordinary mana. Perhaps for that reason, the phenomena that can be produced with magic varies from little things like making a stone in front of you fly, to great feats like a god such as creating vast new lands, continents, and islands. Casting spells basically requires some means of issuing commands to mana. In general, most spells are cast by “chanting” out loud and reciting the incantation of a spell or performing a specific gesture. Additionally, large scale spells can also be cast in the form of “rituals”, which require time spent laying the ground work and preparing intermediaries and offerings in advance.
And the most important thing of all when invoking a spell is mind power.
In other words, it is necessary to intensely focus one's thoughts and mentally visualize the phenomenon that one wants to bring about. For example, when chanting a spell to conjure flames, since most people visualize red flames, the magic flames will be red too, but when a monster who lives in a mamono realm that had grown up seeing candlesticks lit with purple colored flames chants the exact same flame spell, the magic flames will turn out purple. Furthermore, if someone with no conception of what flames are were to chant it, the spell itself would not work in the first place. The form in which the flames of a spell appear also varies according to how each caster imagines them to be; they may appear as small fire balls, gigantic walls of flames, or in rare cases, in the form of a dragon for some people. Also, there's the example of the monsters called “alices (Encyclopedia I – p.106)” who conjure cute flames like something out of a picture book because they have only ever seen flames in picture books.
In this manner, the power of the mind is greatly involved with casting spells. As a matter of fact, it's theoretically possible to cast any spell even without chanting, gestures, rituals, and so forth, just by thinking about the phenomenon that one wants to bring about; however, casting a spell with only thoughts requires more concrete, accurate, and precisely detailed thinking. For instance, in the case of the flame spell given as an example earlier, it would require knowledge of the true underlying principles of flame; that is to say, it would require one to have accurate knowledge of information concerning not just the proper form of flames, but also what flames are made of, the nature of the existence of that which we call flames, how flames are produced, what happens to things that come in contact with flames, and so on, and all of it would have to be taken into consideration. Additionally, one would have to be prepared with some sort of guidelines to use to accurately compute the coordinates of the location in which to launch the flames, and moving the flames would require determining how fast and in what direction to launch them; all of this would have to be taken into consideration and the necessary amount of mana required for it would have to be computed in one's head.
Furthermore, it would also be necessary to imagine an element corresponding to a “directory”, in which all of the complex data and processes described above are non-erroneously recorded in order to send commands to the mana. Casting spells with only thoughts requires thoughts to be focused entirely on the spell without any interruptions. If other thoughts enter the caster's mind for even a brief moment, the commands won't reach the mana, and the spell will not work. When using flame magic with the objective of lighting a hearth, if one allows things that are not directly related to “lighting a hearth” to enter one's thoughts for even the slightest moment, the spell will fail simply due to that.
In other words, it is unrealistic for an ordinary person to use magic with only thoughts. For that reason, the system of “magic” currently in use has the above written complex process simplified to the point of “conjuring the flames that one imagines in front of one's eyes” through a spell incantation imbued with a summary about flames, positional data, the required mana cost, and commands. Likewise, gestures are performed when using magic for much the same reason. In some cases, one may hold one's hand out in the direction to fire off a spell, but this is also done to curtail the specification directional information. Groundwork involving offerings and rituals is also conducted to support and simplify casting even more complex spells. The usage of intermediaries, staves, etc., is also a big help when using magic. That which has the complex process of magic simplified in this manner to be worth using by humans and monsters is “archaeomancy”, which is the basis of all magic. Other than that, there are also various other systems of magic such as “nymphomancy”, which is used by succubi, “elemental magic”, which borrows the power of spirits, and so on, but these are all based on archaeomancy optimized so that magic can be used more easily and efficiently for specific intended purposes.
Furthermore, the discussion up to this point was merely a generalization, and there are also those who do not require these simplified systems of magic. Being flame spirits, “Ignis (Encyclopedia I – p. 220)” are themselves embodiments of flame, hence, they themselves are endowed with flame data to begin with, and they can easily control flame magic at will without the need for chanting or complicated thoughts just by thinking “I want to shoot flames”. “Gazers (Encyclopedia II – p.88)” have the power to hypnotize targets. It's extremely complex magic, but it is possible for them to cast it just by staring at a target with their eyeball. In these cases, individuals of such races are born with bodies and instincts equipped with the data necessary for casting spells, and the caster's very existence itself is what simplifies and optimizes the spells. Even among humans, there are those born with that sort of talent for magic who can use it intuitively without even needing to chant or think complexly, and in some cases, some even appear to cast spells unconsciously at times. It is extremely rare for a person to be able to wield a wide array of spells in that manner, but there are a fair number of people who appear to be able to use only an extremely limited number of spells that way, and they are treated as having a high aptitude for certain spells or systems of magic. Moreover, this is more than just an innate trait. Higher rank monsters well-versed in magic and experienced higher rank human mages also sometimes uniquely optimize existing spells so that they can use them more easily without chanting. Among them there are even those who use unique systems of magic that they developed by repeatedly refining and improving existing systems of magic so that they could use them more easily.
In the “great encyclopedia of magic” that follows, I will introduce various “systems of magic” along with individual “spells” belonging to those systems, but the classification of spells is quite ambiguous. Since most systems of magic are derived from archaeomancy, they can also be said to be archaeomancy at the same time, and since there are derivations of derivations, and ones that combine two or more systems of magic, there are also spells that we cannot say belong strictly to a specific system of magic.
Additionally, there are even spells with the exact same effect that are classified as belonging to different systems of magic simply because the method of casting differs. Please bear in mind that the classifications given in this book are ultimately those which are commonly well known, or those which seemed to fit that system the most based on the judgments of the Sabbaths.
A system of magic handed down from the most ancient era which is the foundation of all magic. It resulted from simplifying and improving the efficiency of the originally complex processes of magic to make it easier for humans and monsters to use. Born in the age of genesis and cultivated and refined by humans and monsters all the way up to the present day, it's the most complete system of magic there is.
It's orthodox magic with few kinks, so it's easy to use and suitable for a wide range of uses. The elements needed for casting and a certain degree of directionality are contained in comparatively short incantations and simple spell formulas. This magic can be used by focusing, visualizing the phenomenon to occur, and chanting the spell, and it's possible to make using it even more intuitive by incorporating casting actions. It's also highly versatile, and one can easily modify the magic's effects even just by adding to the incantation or spell formula. When developing new magics, research is usually conducted using archaeomancy, and most of the systems of magic that currently exist are also derived from archaeomancy. Compared to other systems of magic which are specialized for various purposes, there are also cases when its spells are individually weaker; however, a lengthy period of time has been spent on improving the efficiency of archaeomancy, which means it can exhibit greater effects at a relatively lower mana cost. It's also easy to combine different magics. For example, it is difficult to combine conflicting attributes such as “fire” and “water” using “elemental magic”, but it can be easily done using archaeomancy. Also, it is possible to reproduce most of what can be done in other systems of magic by combining and applying archaeomancy spells, but it tends to be difficult.
This is the magic system that has the most casters, including both humans and monsters, and accordingly, most of the outstanding casters, including most of those deemed archmages, are experts in archaeomancy!
古式魔法 koshiki mahou translates more directly as "ancient style magic".
Difficulty: 1 out of 3
Mana Cost: 1 out of 3
A spell to conjure and fire mana. Conjuring and firing mana is one of the most basic techniques of mana manipulation. This “mana shot” is mainly the basis for attack spells which lash out at one's opponent with mana. However, since that which we call mana originally has no mass or attack power, and it's basically just striking a foe with mana, it doesn't have much power at all, although some kinds of mana such as mamono mana have the property of exhibiting an effect even just by pouring it inside the target's body.
For that reason, when using mana as an attack spell, the usual process taken is to materialize it into something that has mass and attack power and manipulate that. We can say that spells that conjure and launch fireballs and spells that shoot icicles as lances, and so on, are all derived from “mana shot”.
Each caster has a different image of the vague invisible energy called mana, and these differences result in the different directions and attributes each caster specializes in. The image of the spell which is one's specialty reflects the mind state of that person himself and the environment in which he has lived, and in the case of monsters, race also has a huge influence. A caster born to a blacksmith who grew up seeing fire and is the impulsive type would tend to be inclined towards specializing in flame spells, while a caster with a calm personality who grew up in a snowy country would tend to be inclined towards specializing in ice spells. Also, the potency of attack magic isn't decided just by the strength of the mana. When conjuring mana, it's also crucial to boost precision via concentration and advanced thinking.
Also, even if we categorize them all as flame attack magic, the effects differ depending on the caster's image of flames. Spells conjured based on a human's image of flames will in most cases have searing heat and cause burning, which will be used to attack. On the other hand, in the case when monsters use flame spells, they don't have the image to harm humans, and at the same time, elements such as “the flames of love and passion” towards men burning inside them and “heat building up in the body” due to the pleasure of sex overlap with their image of flames, and therefore the spells they conjure also mostly take effect by making their target's body flush and burn, heating up their heart, and igniting their passion. Moreover, only the image of brightness goes into flames conjured just for illumination instead of attack magic, so even if the flames look the same, there are also cases in which they don't have the power to burn anything. In this manner, “mana shot” is one of the most basic spells, but at the same time, it has endless variations depending on the user, and we can even say it's one of the spells that most reflects individuality. The child prodigy that Sabbath boasts of, “Momonika”, the lovely goat of the playground, uses “if it's not cute, I hate it!” as a catch phrase, and prefers conjuring magic in a heart pattern, be it flames or whatever, but when “Shirokuto”, the white goat of wisdom, one of the archmages who represents the baphomet race, uses her flame magic, rather than flames, it's horrifying hellfire that looks like a gigantic *monster clad in flames.
Furthermore, mana is intrinsically invisible, but granting mass and attack power to something invisible is extremely difficult, and so even in the case of spells that fire pure energy, it is conjured in the form of flashes or spheres of light, etc. Invisible attack magic by means of purely formless “void” mana, undetectable to the eye, is a feat that only a handful of extremely exceptional casters in the world are capable of performing.
“May you continuously gasp in agony amidst my incessant flames...”
~”Shirokuto” the White Goat of Wisdom~
Difficulty: 1 out of 3
Mana Cost: 1 out of 3
A spell that grants the target a magical effect. One of the most basic techniques for manipulating mana, which causes the target to exhibit magical effects by imbuing it with mana. All enhancement spells which infuse living things with magic to boost their physical abilities and what not are actually variants of enchant, but the name “enchant” itself mainly refers to imbuing items with magic.
Imbuing a sword with a flame spell to add a flame attribute or imbuing armor with a hardening spell to make it more durable are examples of basic uses for it, and it's even possible to do things like making a magical sword capable of dispelling targets struck with it by imbuing a sword with “spellbreak (p.45)”, or making magical armor that automatically repairs itself even if destroyed by imbuing armor with a mending spell. Normally the mana imbued dissipates over time, and the magical effects wear off, but by performing “affixation processing”, which adds in a spell formula that allows effects to be maintained by automatically gathering mana from the surroundings to replenish it, it is possible to produce “magical items” that maintain their magical effects almost permanently. Unfortunately, if left as is, the item will then be in a state where the effects will constantly be active, but if it's not the type of item that always applies effects to the one who possesses it, then it's also possible to set conditions to trigger the effects, for example, “when the caster prays while holding the item in his hands”, etc.
Simply imbuing an item with magic isn't difficult at all. Even novice casters can do it, but affixation processing and setting conditions is difficult for all but experienced casters. The larger the scale of the spell being sealed inside, the greater the difficulty increases, so in the case of magical items imbued with high level spells, they may break after only a few uses, or even just a single use. Therefore, magical items produced by inexperienced casters may be shoddy products that don't produce the correct magical effects, and can even be dangerous if they scatter the magical effects all around indiscriminately since they are not set with conditions.
Additionally, spells that imbue non-living inorganic things with life such as “golems” are also more complex and higher level “enchant” spells. The easier it is to imagine the connection between the spell to be imbued and the item itself, the easier it is to imbue and affix a spell. In other words, it's easier to imbue swords with offensive spells, and set the trigger conditions to things like “cutting” and “swinging”, which are natural methods of using a sword. This is also the reason why golems, etc. are mostly made in the shape of humans or animals. What's more, even the same basic article can be made more easily enchantable by altering the overall design or adding clever little details. For instance, it's easy to enchant ordinary armor with protective spells, but difficult to enchant it with offensive spells; however, if the armor is adorned with spikes and has a design evocative of sharpness, then it will be easier to enchant it with offensive spells. For that reason, there are many items which are crafted with enchanting in mind beforehand. For example, they may be adorned with decorations that call to mind a given spell or be engraved with the words of a spell's incantation or magical patterns by craftsmen.
On the one hand, the item itself which is to be enchanted is important, but the image the caster has of the item, the caster's moral values, and the power of imagination are also crucial factors. For instance, from a monster's point of view, clothing, armor, etc. is meant to be worn to flaunt their own attractiveness and further inflame men's passions rather than as a means of protecting the body. Therefore, if the caster is a monster, it's possible to imbue spells such as “seduction(p.49)”, etc. with greater effects, and create powerfully enchanted items which attract the eyes of men and guide their gaze and consciousness to the breasts, *genitals, etc. Furthermore, all sorts of desires are connected to sexual desire, and various cultural practices are rooted in having sex with men, so if a monster gets her hands on them, all manner of things including weapons, golems, writing implements, and even tableware can be made into magical items with lewd effects.
The renowned enchanters among the “march hares (Encyclopedia II – p.130)”, a race living in Wonderland who interpret everything in a lewd manner, are said to even be capable of picking up a random pebble from the roadside and imbuing it with a lewd effect like a divine treasure by going on and on about their wild delusions, or rather, adding imagination.
“Master, can you enchant me with a spell to attracts a man's gaze?
Currently, I have targeted a male human individual for essence extraction,
but essence extraction efficiency will increase if he's gazing at my bosom.
Besides... If he gazes at me like that... aah...♥”
~a golem who will so be joined with her partner in the future~
*下腹部 (kafukubu) directly translates to “lower abdomen”, but it can also be a euphemism for the genitals.
Difficulty: 1 out of 3
Mana Cost: 1 out of 3
A spell for placing concentrated mana, creating a marker. Mana normally dissipates soon after release, but this spell, one of the most basic spells for manipulating mana, causes it to remain at a single point by condensing it. The greater the caster excels at controlling mana, the longer it is possible to make the mana persist.
Condensed mana is still invisible, but it can give even those who normally can't sense mana a feeling that “there is something there.” Markers are used like beacons by setting them at specific points, and they can also be set up so that they signal only to certain targets. For example, by adjusting the concentration and quality of the mana, they can be made undetectable by ordinary humans so that only magicians or certain specific races will be able to sense them, or they can be made so that they're difficult to notice unless one is in possession of a certain magic item. For superior magicians, it's even possible to do things such as including messages for those able to detect the set marker, or imbuing spells so that those gathered around a marker can be healed.
Additionally, markers set by this spell are also used as targeting marks when firing spells. When casting long range spells that extend even beyond the caster's field of vision, it's difficult to aim and fire, and spells will often hit unintended locations, but if a marker is set in advance and targeted, then one can ensure that a spell will land accurately. AoE spells are difficult to fine-tune in much the same manner, but by setting a marker to encircle a specific area in advance, it is also possible to ensure that a spell's effects will only extend over the encircled area. It's highly difficult compared to setting markers at specific locations, but it's also possible to set markers on objects and living things. There is a high likelihood that it will be canceled out quickly, but it's even possible to cast spells that automatically home in on the target by setting a marker on the foe one wants cast magic on and then targeting it before firing.
When using this spell as a marker for other people, it's basically used to communicate with allies. Sometimes there are markers set by officious monsters pointing out locations where lots of unwary humans pass by and monsters can lurk in a perfect spot to attack men without being noticed. Upon carefully sharpening their mana sense and taking another look, unmarried monster ladies seeking men will find out that there's information about “hunting grounds” scattered all over the place that their senpais left behind. Besides that, the property of this spell “to give even those who can't sense mana a feeling that something's there” is also exploited by monsters to use it as a method of luring human men into their own lairs.
Also, in nations where humans and monsters live together, an unconventional use of this spell is to cast it on unmarried human men to help them get together with specific races of monster girls. Markers that can be strongly perceived by the corresponding race that a man desires are set on human men. These markers tell other races of monster girls, “I want to be joined with a specific race, so keep your hands off me”, and an extremely wide area is affected, so it's like a man advertising himself to every individual of a particular race that he is seeking, and unmarried individuals from among them will probably gather before the man, scrambling to be first.
“We've discovered the outpost targeted for subjugation.
We'll leave a mana marker behind and return for now.
…There are five men within the target, a perfect number.
Why don't we share them nicely and enjoy ourselves...♥”
~amazoness in a radical sweeper unit~
Difficulty: 1 out of 3
Mana Cost: 1 out of 3
A spell that dispels magical effects cast on a target. Spells with ongoing effects invariably leave the caster's mana in the target's body to maintain the spell, and the effects of such spells can be ended by causing that mana to disperse.
However, to dispel a spell requires as much mana as is being used by that spell, or perhaps even more. Also, this spell is by no means omnipotent. Only spells that are “temporarily” active can be dispelled. For example, it's possible to dispel spells that are used to temporarily boost physical abilities using mana, but the kind of spells that restructure the body to permanently maintain high physical abilities cannot be dispelled. It is also powerless against spells that are constantly active as part of a race's ecology, as well as spells that have been applied with affixation processing to magical items, magical creatures, etc. In other words, the “protective mana” that safeguards her partner during sex that all monsters possess, the flotation of the sort of races that constantly use mana to fly, and so on, cannot be dispelled. Neither can beings that came to life from mana dwelling within objects be returned to mere objects with this spell.
Furthermore, changes that were produced directly by the effects of a spell can be dispelled, but it has no effect on the phenomena that occurred along with that. For example, suppose that a target has been magically implanted with lust like that of a inma and she is copulating with a man. It would be possible to extinguish the lust she had been implanted with using “spellbreak”, but even so, once a woman has known devilish pleasure, it becomes engrained in her body and mind, and will never disappear. Even if the effects of the spell were the impetus, the desire to continue immersing herself in sex and pleasure that newly sprouted from having known devilish pleasure, and the gradual transformation of her mind and body into that of a inma cannot be undone because it is no longer due to the spell's effects.
The various spells that monsters use to charm men can also be dispelled with “spellbreak” in some cases, but the charm monsters possess that enthralls human men is ultimately something a monster is inherently endowed with due to monster ecology itself. Spells only support it. If a man has beheld a monster's uncanny beauty, exchanged words with a monster who tempted him in a lovely voice, reached towards her soft skin which looks as if just touching it would feel wonderful, or simply received pleasure from a monster for even the briefest moment, then the fact is that he will be charmed by that, and the lust aroused in him will no longer have anything at all to do with the effects of a spell. If a man has “directly” come into contact with a monster's charm in any way, shape, or form, then it will already be too late even if the spell is dispelled.
“I'm fine now that you broke that spell the inma put on me.
You've saved me... haven't you...
Aah... You look very yummy...♥”
~a human female knight who had been captured by a inma~
"Sakyubasu" is a katakana transliteration of the English word "succubus", but "inma" is a Japanese word for "succubus". Sometimes KC also refers to other fiends such as imps as "inma" too. For clarity, we'll keep "inma" as "inma" especially since the succubus profile notes they are meant to be two different names.
Difficulty: 2 out of 3
Mana Cost: 2 out of 3
A spell that warps the target to another location far removed. This spell is the culmination of exhaustive research into moving objects using mana, one of the basic ways of manipulating mana, and it is regarded as one of the most highly difficult spells. Teleporting living things like humans and monsters is extremely difficult. An advanced spell formula designating the coordinates of the far off destination, etc., is required along with a correspondingly vast mana cost. Among the “baphomets (Encyclopedia I – p.180)”, there are even those who perform all of their movements using this spell, but that's possible precisely because baphomets are a superior race with elite mastery over magic. Ordinary monsters and human casters are incapable of that.
But on the other hand, it's not that unusual at all to find casters who can wield this spell. In fact, it's even used a lot in our daily lives. This is because mana, originally a scarce resource, is continually plentifully produced in mamono realms, and the teleportation spell has been simplified as much as possible to be of practical use. It is necessary to strongly focus one's thoughts on the destination. Using the spell however one likes to go wherever one pleases is extremely difficult, but using it just as a one way ticket to return to a place deeply connected with the caster, such as the caster's home, is comparatively easy.
Besides that, another effective method of usage is to establish the coordinates of the point of departure and the destination, and then set some sort of guide marks. For example, by setting up magic circles with teleportation spells that incorporate “mana marker (p.44)” into the spell formula at two locations and using both of them as guide marks, the positional information can be omitted. Due to this, it's even possible to permanently establish magic circles that enable teleportation of numerous people at the same time in either direction, and it's treasured as a method of long distance movement in mamono realm nations.
There's also the method of using a person's individual mana as a guide mark, which is possible for monsters precisely because of their proficiency in distinguishing the mana of individual people. Naturally if the mana of an individual is known, it's possible to teleport to the target's location, but by determining if anyone else's mana is in the body of an individual, and figuring out places where strong traces of the target's mana remain, it's even possible to teleport to places deeply connected to an individual, such as an individual's home, etc., or to the location of the family of an individual. When prisoners of war originally from nations under the control of the Order of the chief god or those who have newly become monsters wish to bring their family to immigrate to a mamono realm, often times there are cases when it is difficult to just go and pick them up directly, and in such circumstances, the method employed is to connect a teleportation magic circle to their home or the location of their family and bring them directly to the mamono realm.
Furthermore, the easiest way that teleportation magic can be used is for a monster and incubus husband and wife to use each other as markers. Since they both possess the same mana, a mixture of each other's mana, it's extremely easy to teleport in both ways, and it's possible to casually teleport to one's spouse.
Married monsters mostly spend their time constantly having sex with their husband, but there will probably also be times when they will have to temporarily separate from him to take care of some sort of errand. When away from their husband, even just suddenly recalling his face is enough to call to mind the joy of being held in their husband's arms and the taste of his essence, and this may even cause unbearable lust to come over them. At times like that, as long as they have acquired this spell, they can instantly return to their husband and enjoy sex to their heart's content.
“I'm home. Uhm... What is it? I just wanted to touch you a little bit, ya bastard...♥”
~a dullahan, the following day after departing on an expeditionary mission~
Difficulty: 3 out of 3
Mana Cost: 3 out of 3
A spell for creating a new space called a “spirit realm”. This spell creates new “worlds”, which was originally the work of the gods, so to speak. It's the highest level spell, classified as the most advanced spell in existence, and it requires the most mana. Of the large scale spirit realms created using this spell, “Pandemonium”, created by the fallen god, and “Wonderland”, created by one of the daughters of the mamono lord, are among the most famous.
An archmage would have to expend a vastly enormous sum of mana simply to create a small room where nothing exists. Creating a space the size of a kingdom and then creating land, nature, and buildings there would absolutely require godlike power. But since it has become possible to infinitely accumulate power by having sex with one's spouse in the present era, there are a fair number of monster and incubi casters with power to the degree of a lesser divinity, and it has now become easy to create small scale spirit realms using the overflowing mana that is continuously generated in mamono realms.
For that reason, things have gotten to the point where it is no longer rare for a powerful monster to prepare a room in a spirit realm to use as a bedroom for living with her husband, or even to have her own small mamono realm in a spirit realm, as if owning a villa in a summer resort. Our Sabbaths also possess numerous branches, test sites, and venues for black mass in spirit realms.
Spirit realms are created in different dimensions than the current world, but the dimensions intimately overlap, and it is supposed that they are somehow connected to it. Such overlapping places can serve as entrances or exits to spirit realms. In some cases, doors or gates, etc. are artificially established so that the entrances are easily recognizable. But in the case of Wonderland, there are lots of entrances that were randomly generated. Mere hollow trees and holes in the ground, etc. can be connected to Wonderland, and there are even cases such as when people walking through forests unwittingly wind up in Wonderland. Furthermore, even “Pandemonium”, which supposedly has no entrances or exits, and can only be accessed via a spell cast by adherents of the fallen god, does have more than a few places that overlap with the current world, and people do randomly stray into it on extremely rare occasions. Also, when spirit realms nearly overlap with places in the current world in such a manner, they sometimes exert influence. It is supposed that humans who live in lands that nearly overlap with Pandemonium are highly likely to awaken to the fallen god's faith. As for the closest spirit realms, in some cases there are near identical spirit realms created at the “backside” of structures, villages, etc. that exist in the current world. The venues where our Sabbaths secretly hold black mass in human villages are also mostly created in places such as the “backsides” of the chief god's churches.
Even after creation, mana is required to maintain spirit realms, but since all living things produce mana, spirit realms can be maintained as long as life is active there. If life goes extinct in a spirit realm, then it will gradually contract and eventually disappear. Conversely, as long as life exists in a spirit realm, nothing can extinguish its existence. What's more, if human and monster married couples live there, then sex will result in the production of vast amounts of mana, enough for a surplus even after paying the spirit realm's maintenance cost. That's why as the number of couples inhabiting a spirit realm increases, a spirit realm will naturally expand larger.
“This is our bedroom, where you and I will make love...
This is the place to which you will return.
You thought you opened the door to your own room...?
No, no matter where you try to go, you'll always
end up returning here... and coming back to me...♥”
~a lilim, a daughter of the mamono lord~