Boar's Ferocity

(Complete Divine, page 79, DnD 3.5)

[Wild]

You can continue fighting even at the brink of death.

Prerequisite

Ability to wild shape

Benefit

If your hit points are reduced to 0 or less (but you aren't killed), you can spend one wild shape as a free action (even if it isn't your turn) to continue acting as if not disabled or dying. The effect lasts for one minute.

Normal

When reduced to 0 hp, you are disabled and can take only a single move or standard action each round. When reduced to -1 to -9 hp, you are dying and drop unconscious.