- Patch 6.0.2 (2014-10-14): Re-added. Now a silithid ability.
- Patch 5.0.4 (2012-08-28): Removed. Replaced with .
- Patch 4.0.1 (2010-10-12): Redesigned. No longer causes damage or reduces movement speed of the target. Now causes the target to take additional bleed damage for 15 seconds. Cooldown reduced from 20 to 10 seconds. Focus cost removed.
- Patch 3.0.2 (2008-10-14): Added.