User blog comment:Dragon´s Blade/World Coexistence Alliance/@comment-98.211.214.12-20140723144625/@comment-98.211.214.12-20140723160354

Lich: Hmm. Well, what you seek is immortality. Humans who become incubi keep their youthful looks until they die. They live as long as their wives, so that a good few thousands of years. Your case is the same, even if you're not human. But to increase your lifespan, you need to have sex with beings that have ininite lifespans. Such examples are Lilims that are especially powerful, like Deruella. There may be plenty of Lilim like that.