Doomsayer

Misery and disaster is a common sight in the Badlands, but it can be empowering to those that declare it. None relish more from it than those cursed with the ceaseless whispers that plague their minds, driven to borderline absurdity, until proven right. Doomsayers as a result, are unaffected by their own failures but instead, seem to profit off it.
Whenever you roll a 1 on a D20 Test in combat, you are healed a number of Hit Points equal to your Proficiency Bonus. This healing takes place after the effects of the roll (e.g. you fail a Saving Throw and then you are healed, not before).  


Note: Maybe don't play a Halfling.