Basically, the concept would be for a Kirigakure Shinobi who would specialize in poisons. He would come from a clan where a ritual that involves the infusion of chakra along with various venomous substances on newborns. The effect they aim for would be an incredibly acute adaptation of the newborn's body, causing them to develop an immunity of some sort to poisons. Later on, their affinity to poisons would allow them to generate different types using their chakra.

The drawback of such a procedure is the high risk of mortality it causes. Most end up dying; this would explain why the members of their clan would be only a few. The degree of cruelty that accompanies this ritual complements the harshness that comes with being from Kirigakure. Another example of this would be Zabuza's requirement for graduation from their academy, which was to slay every single one of his classmates.

Anyway, physically, the amount of stress the poisons impose to the body causes a drastic change in the appearance of those who survive the ritual. They would appear extremely pale, white, depigmented hair, and blood-red eyes.

So, would this have a place in the roleplay?