Deathless Initiate

Combat

For you, impending death is a call to wrath.

Prerequisite: Str 13, Con 13, orc or half-orc, Diehard, Endurance, base attack bonus +6.

Benefit: You are not staggered while using the Diehard feat, but if you take a move and a standard action or a full- round action while you are at 0 or fewer hit points you take 1 point of damage. Further, while using the Diehard feat, you gain a +2 bonus on melee attacks and damage rolls.

Source: Ultimate Combat