Talk:Monster Girl Encyclopedia World Guide III: Sabbath Grimoire/@comment-46040649-20200924174620/@comment-10429980-20200925180923

Technically you can indeed still die from having your mana drained. After all having no mana = being dead, and this was very much what many succubi and other monsters did in the previous age. As explained in World Guide 3, it's just that thanks to Lilith's changes to mamono mana, monsters can easily put back enough mana to keep a man healthy while still getting plenty themselves to eat. In this way mamono mana supports the man during feeding and reduces the burden on his body. And of course once he becomes an incubus he an actively feed on the increased mana his mate has converted into her own, resulting in the theoretically infinite loop that one incubus and one monster can get into.

And of course if an incubus chose to not consume his mate's mana, he could still fall unconscious rather than have sex indefinitely. Some may enjoy doing this for the sake of a fetish, to the point that they hallucinate being "sucked dry."

On the other hand, if a non monster is draining them, monsters and incubi can still readily fall unconscious regardless. Tentacle plants won't drain to the point of killing in the modern age, but since they feed on mamono mana and the fiercer ones deep in forests take in all the excess mana monsters produce by having sex, the end result is both the monster and incubus having their unconscious bodies taken back to the edge of the forest by the plants.