From Pathfinder #178: Punks in a Powder Keg, which isn't enabled.

Pain Tolerance

FEAT 6

Prerequisites expert in Fortitude saves

Access You're from Alkenstar or the Mana Wastes.

You gain resistance to mental damage equal to half your level and a +1 circumstance bonus to saving throws against effects that would make you Clumsy, Drained, or Enfeebled.

Pathfinder #178: Punks in a Powder KegOGL