Wolverine's Rage
(Complete Divine, page 86, DnD 3.5)
[Wild]
You can fly into a berserk rage when injured.
Prerequisite
Wild shape
Benefit
If you have taken damage during the last round, you may spend a wild shape as a free action on your turn to enter a rage. While in this rage, you gain a +2 bonus to Strength, a +2 bonus to Constitution, and take a -2 penalty to AC. This rage lasts for 5 rounds and cannot be ended voluntarily.