Dark Matter is a nymphomancy spell described in Monster Girl Encyclopedia World Guide III: Sabbath Grimoire.
Guide Book Entry
A spell for materializing the power of darkness and controlling it at will. It is a “Mana Shot” using nymphomancy, which entails materializing highly condensed mamono mana, forming a slushy dark colored mass of it, and putting it to use. The spell is named “dark matter”, the same as the monster race, and it's the same stuff as the black sphere that the dark matter monster sits astride.
The materialization of mana is itself the basis of magic, but compared to other systems of magic, it's extremely difficult to picture and materialize the element governed by nymphomancy, which is something like “pleasure” or “desire”, since it doesn't exist in any clear form. What's more, nymphomancy itself is a system of magic in which spells may even be autocast when the caster's desires are read, which further exacerbates the difficulty of consciously controlling it. Thus, the only ones who can control dark matter at will are those such as casters of the highest rank who are extremely adept at wielding magic and high rank inma born as beings who embody desire and pleasure. For others, it requires filling themselves with pleasure and desire by having sex with their partner countless times, so that they understand it both physically and mentally, and become a being lewd enough to embody it.
Since dark matter is a mass of desire, if a non-monster being touches it, it will immediately penetrate the interior of the target's body in a voracious attempt to erode the target's mana, and since it is also a mass of pleasure, during this time, it induces pleasure and a burning sort of flushing, which is almost like the erogenous sensations experienced by a monster, leading the target to climax. Given that monsters basically use their own body to provide pleasure when attacking human men, in most cases, it's used to pleasure women and break them with the goal of changing them into monsters. Dark matter is mostly materialized in the form of a sphere, which is easier to picture when solidifying mana, or in the form of tentacles. If the caster is able to control it, not only the shape, but also the texture and hardness can be freely changed. For instance, it can be changed into sticky liquid that envelops and binds a woman's body, while gradually continuing to pleasure her, or it can be changed into firm, rubbery tentacles, which can be used to penetrate a woman orally and release condensed mana liquid inside her mouth, or crawl all over her breasts and knead her nipples using the tips, providing sharp pleasure. What's more, despite being materialized, it also retains the true nature of mana which is incorporeal and intangible, and depending on how it is used, it can even phase through objects, flesh, and so on. It's possible to do tricks like breaking a woman by slipping it inside the vagina without piercing the hymen, or slipping it into the womb through the navel to erode only the womb itself, remaking it so that it throbs seeking a man's essence like that of a monster. Even compared to other methods, dark matter is one of the spells that is most efficient at mana erosion. Just by continuously touching dark matter, a human woman will gradually transform into a monster, and if her entire body is engulfed by dark matter, then it will lead to instant monsterization.
Furthermore, due to its very nature, if magic is shot into dark matter, it erodes all the mana and ends up growing even bigger. A spell flung to try and save a woman who was engulfed by dark matter will only have the opposite effect, aiding her rebirth as an even lewder monster.
Since nymphomancy is often autocast according to the caster's desires, when inexperienced casters create dark matter, it sometimes starts moving automatically, and the caster herself is dragged in and violated by it. But there are also those who try to take advantage of this to live while constantly immersing themselves in pleasure by sitting astride a sphere made up of dark matter, or shrouding their body in tentacles made from it.
“Kuroferuru”, the black goat of dark sludge, who is the seeker of nymphomancy, is also one of them. She invariably grants those who become witches of her sabbath “black goat's blessing”, which makes it so that their mana keeps unconsciously materializing as dark matter. Thus, every witch of black goat Sabbath is always being forced to conjure as much dark matter as she possibly can and cover her body in it. The size of the dark matter is indicative of the amount of mana she possesses, and the degree to which she can control it is indicative of her magical talent. Naturally, almost all inexperienced witches are unable to control it, so the dark matter “moves according to their desire”, and they wind up having their own body continuously toyed with and violated by it, but they're able to continually immerse their body and mind in “pleasure” and “desire”, which is viewed as important for using dark matter, and at the same time, by continuing to constantly materialize and employ condensed mana, they are able to unconsciously imprint themselves with the method to materialize it, and that itself makes it effective training for controlling dark matter. Plus, the power of nymphomancy increases the more the mind melts with pleasure, so we can say it is extremely logical for those who wield nymphomancy.
“Expose your desire and lay it bare. Let it be known far and wide that you are a slave to base pleasure. Our sorcery exists precisely beyond the point of falling.”
~”Kuroferuru”, the Black Goat of Dark Sludge[1]~
References
- ↑ 魔泥 madoro is actually just another term for dark matter, so it's probably better to call the last part of Kuroferuru's title something like “dark sludge” rather than “devil mud”.