Deathless Zealot
Only the most serious wounds can stop you.
Prerequisite: Str 13, Con 17, orc or half-orc, Deathless Initiate, Deathless Master, Diehard, Endurance, Ironhide**, base attack bonus +12.
Benefit: Whenever a creature rolls to confirm a critical hit against you, it must roll twice and take the lowest result.
Source: Ultimate Combat, p. 95