Board Thread:Warhammer 40k General Discussion/@comment-5846164-20130322210013/@comment-2253300-20130401211446

To become a Daemon Prince you need to openly worship a force of Chaos, possess the necessary strength and/or cunning to gain the gods' favor, and lastly you need to last long enough without dying or becoming a spawn. Those are the requirements for being a Daemon Prince. Well, that and having a soul. (Necrons are out of the picutre, and the Tau aren't likely to get corrupted because the Chaos Gods can barely see them.)