Patch 1.9.0 (2006-01-03): Now applies a healing effectiveness debuff on the user instead of the attack power penalty. The healing debuff is applied immediately upon using the ability.
Patch 1.4.0 (2005-05-05): Now increases base melee attack power by 25% for 15 seconds. When it fades base melee attack power is reduced by 25% for 45 seconds.
Patch 1.1.0 (2004-11-07): Added.