Dispater’s Iron Discipline

Paragon Tier
Prerequisite: 11th level, tiefling
Benefit: You gain a +2 feat bonus to your Will defense.

In addition, when you make a saving throw to end an effect that stuns, dominates, or dazes you, you gain a bonus to your saving throw equal to your Charisma or Intelligence modifier.

Published in Player's Handbook Races: Tiefling, page(s) 27.