Essence

This article is a translated section from the Monster Girl Encyclopedia I book pertaining to all "magical energy" related things within the MGE world.

Mana
A vital energy possessed by humans, and various other races besides monsters. Men especially have a lot of it. When human wizards or elves use magic, the energy used is the same thing as mana, but the monsters are the only ones who actually refer to it as such. It is generally called magical energy. It is extremely similar to the mana of monsters. If human mana is the plus, then the mana of monsters is the minus. They are related like two sides of the same coin.

A Feast for Monsters
The monsters feed on mana which they get from men through sex. Much mana is included in the saliva and semen of men. Besides swallowing it down and absorbing it along with everything else using their mouth, they most of all enjoy the method of using their vagina to squeeze out semen. As far as the monsters are concerned, human mana is a treat far better than any other food. When they gain mana, their thoughts melt away as they experience a powerful rush of joy and ecstasy. mana that they've absorbed in this way is then converted to monster mana, which will be discussed later, inside their body and stored.

The taste of the mana is heavily influenced by the state of the monster when she takes it in. The stronger her desire is for the man who will become her prey, the more exquisite the taste of the mana becomes, especially the taste of the mana of a man that instinct has recognized as her husband. It tastes so much sweeter to her than anything else that she wouldn't even bother feeding on another man's mana again. Most of the monsters become a prisoner of their husband's mana. It is said that many of them even fall into a state that could be called “semen addiction.” Also, there are some medicines made from mana for nutritional supplement. But for the reason described above, it seems that it's not something that tastes very good to them at all. Furthermore, human men are always giving off minuscule quantities of mana. By sensing it, the monsters can infer the presence of a human man. They are especially sensitive to the mana of their own husband. They are always able to sense his location and track him down. It is to such a degree that no matter where he tries to hide, she can always find him no matter what.

Recovery of Mana
The mana that dwells within the body of a human, besides being stolen away by monsters, can also be spent through casting spells. Even if mana is lost for one of these reasons, it never results in death, though it may cause the person to feel fatigue, or pass out. In the case of human men, they have the power to create mana inside their body. It is possible to recover their mana through eating, or getting sleep. In the case of women, this function is very weak compared to how it is in men, but they are able to make up for what they lack by absorbing the mana released by men around them. However, in the case that there is monster mana around them, they take in the monster mana in place of the human mana that they're lacking. Because of this, their mana recovery function, which was weak and lacking to begin with, completely ceases. The monster mana settles in the woman's body and ends up causing monsterisation. Additionally, when a man becomes an incubus, his mana capacity is extremely increased, and his mana production function also rises by leaps and bounds.

The Mana of Monsters
Monster mana is the vital energy that all monsters have inside of their bodies. Monsters always have a race specific mana along with Succubus' mana that pours into them from the Demon Lord. Compared to humans, many of them have high magic power.

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The Source of Monster Mana
Since monster mana is mainly produced by absorbing “human male mana,” then converting it into monster mana inside of their body, it is purported that the more an individual has sex with men, the higher the magical energy she will possess. Due to this magical energy, the spells they use are often vastly more powerful than similar spells used by ordinary humans. Some of them even have magical energy powerful enough to level a small town. However, of course, being monsters, they wouldn't use their magic power for something like that. Instead, it is mainly used for spells to seduce men, or enhance sex with men. Succubus' demonic energy is an energy that is especially well suited for charm and aphrodisiac spells, etc. In the present, since all monsters have at least a bit of succubus' demonic energy, the charm spells which were only used by some monsters such as succubus, etc. are now regarded as the chief fundamental spells that monsters use. Furthermore, not all monsters can use high level spells. Even if all monsters have magical energy inside their bodies, they may not know how to use that energy freely, or they may not have the intelligence necessary to use it. Some races are not good at handling magical energy, and some can't handle it at all. For such reasons, there are many monsters that can't use spells at all.

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The Various Roles of Monster Mana
Aside from spell casting, small amounts of monster mana are continually being released from the monsters' bodies. Monsters are always in a state where they're draped in monster mana. This mana that is released is used by them unconsciously for various purposes. When they have sex with a man, the energy serves to protect the man's body. No matter how roughly and how long they have sex, the man's body never enters an abnormal state worse than fatigue, and he can never die due to sex. It also ensures that the man won't be harmed by the monster's horns, scales, etc. If the man touches the tip of a pointed horn or scale, the demonic energy covering the horn or scale gently pushes him back with a feeling like the touch of soft skin.

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Magical energy of the Succubi
Monsters are beings that are always under the influence of the Demon Lord, so all monsters currently have at least a little of the current demon lord's succubus mana stored inside their body. The monster mana that they release outside of their body also contains some of the succubus mana. It is the most appropriate type of magical energy to be used for casting charm, and aphrodisiac spells.

Currently the special traits of all the monsters were strongly influenced by this monster mna. The succubus mana is one of the important elements that gives shape to the current world of monsters. The succubus mana is extremely powerful, and if a human is infused with it, the mana that the human originally had spills out as though having been expelled. As a result, in the case of men, they'll spit out a lot more mana for the monster, and their transformation into an incubus will be greatly hastened. In the case of women, the inside of their body will become filled with the succubus mana and they'll change into a monster from there. Land that is always full of this monster mana and firmly under the demon lord's power is called the monster realm (p. 228). Since the monsters of this land have vast amounts of this monster mana, they are far more powerful and lustful in comparison to the monsters of other lands.