Talk:Incubus/@comment-45424649-20200802121304/@comment-10429980-20200806175154

Mamono mana already broke their prexisting limits though, what Lilith's goal is to become powerful enough to fully and permanently change the settings of the MGE reality. In World Guide 3 Runya Runya expressly speculates that the reason the chief god hasn't recovered yet is the simple fact that deities regenerate mana far more slowly than any other type of being thanks to just how massive their mana is.

Regarding limits, every monster basically has limitless potential power growth "in theory" once they have a husband, since the unique aspect of mamono mana is that it grows when encountering other types of mana (especially in the midst of sex or loving interactions). That said, in practice power growth does indeed slow immensely after a certain point (hence why Lilith is still not quite powerful enough despite having accumulated power for a thousand years), so for races with naturally lower power levels and shorter lifespans, they generally won't reach extreme power levels unless they were born as exceptional individuals or married very powerful men (basically most die of old age well before their power level reaches godlike levels).

How this applies to undead, who apparently are not known to die of old age, is as yet unknown. Yet they've only been like this for a thousand years or less, so a lot may yet be unknown about their potential and the long term effects of the new way they work (and Hel could always alter again how undead work if it becomes an issue, as she's the one who made it so undead get a eternal afterlife in the living world).