After prolonged exposure to a poison or toxin, you have rendered yourself immune to it.
Benefit: You are immune to one specific poison (chosen by you), whether available as a blade poison, the venom of a specific creature, or one other toxin. You also gain a +1 circumstance bonus on saving throws against other poisons.
Special: A character can take this feat multiple times, choosing a different poison each time. The +1 bonus against other poisons does not stack with itself.