Talk:Demon Lord/@comment-31655597-20171124142458/@comment-10429980-20171127150053

One problem with your scenario is you seem to have misunderstood how incubi work. They can feed on monster mana and convert it into essence/spirit energy, (and of course also produce their own essence through feeding on regular food). Ergo a incubus in the womb would develop just fine feeding on his mother's energy. In-setting the only thing preventing monsters from giving birth to incubi is that the god's setting of "monsters are superior to humans" still hasn't been fully broken/changed. Due to this a monster's child defaults to a monster, monsters are still about power and they can't give birth to an inherently "inferior" being. Despite how incubi were meant to be equals of monsters, they are still defined as "human" and thus in the setting's hierarchy they are lower.

Undoing this part of the setting, elevating humans to be equals and counterparts of monsters, is a major part of the Mamono Lord's goals.

In fact there is actually a way for a monster to give birth to an incubus even in the current age. KC has related that if a pregnant woman is monsterized and the fetus is male then he will transform into an incubus. This is basically a loophole in the "monsters can't conceive males" rule of the setting because the mother was not a monster when the child was conceived.

But you are right that mamono/demon/monster realms could have expanded a lot more, but aside from extremists most monsters do not actively try to transform/conquer new areas, and their armies usually only act in self defense or the defense of others. This is why even after 1000 years of her reigning, the Order still maintains a lot of land. That and because presumably when the Mamono Lord came to power the number of monsters was at an all time low for that period of the cycle (monster numbers decrease as they kill each other until a new Mamono Lord rises to power).