Devil's Stamina

 
Prerequisite(s): Devil's Favor, Base Fortitude Save 3+
 
Benefit: You gain 2 extra hit points per devil-touched feat you have selected, including this one. These hit points add to your maximum hit points, just like hit points from any other source. In addition, once per day you gain fast healing equal to the number of devil-touched feats you possess for 5 rounds.
 
Source: Fiendish Codex II: Tyrants of the Nine Hells