- Patch 5.0.4 (2012-08-28): Redesigned. No longer slows the speed of enemies, instead it weakens the armor.
- Patch 4.0.1 (2010-10-12): Redesigned. No longer causes enemies with 10 yards to cause their next attack to miss. Now reduced melee and attack speed of all enemies within 10 yards.
- Patch 3.0.2 (2008-10-14): Added.