Yuan-ti anathema

Yuan-ti anathemas were the result of a ritual that transformed a yuan-ti abomination into a larger, more powerful and more aggressive creature. They were considered by their followers to be the pinnacle of the yuan-ti race.

Description
Anathemas were immortal and considerably larger than abominations, with claw-like hands and six snake heads.

Ecology
The ritual that transformed an abomination into an anathema was cruel and painful, involving the sacrifice of hundreds of snakes and requiring the abomination to bathe in the blood of its enemies. Some yuan-ti disliked the idea of creating a new anathema, because they were far more aggressive and brutal leaders than abominations.