Left for Dead (Su)

At 5th-level, a Pathfinder delver can cheat death once per day. If he would be killed by a melee attack, ranged attack, or effect that requires a saving throw, he is instead reduced to –1 hit points and knocked unconscious, but is stable. He appears dead (though a character who succeeds at a DC 25 Heal check or who uses an ability such as deathwatch can tell he is not) for 1 minute, after which he regains 1 hp and becomes conscious (unless healed sooner).