Arms, Protection: Attempts to finish off a foe, causing up to (295.8% of Attack power) Physical damage based on Rage spent. Only usable on enemies that have less than 20% health.
Fury: Attempt to finish off a wounded foe, causing (239.8% of Attack power) Physical damage. Only usable on enemies that have less than 20% health.
Rank 2: Execute no longer has a cooldown. Rank 3: If your foe survives, 20% of the Rage spent is refunded. Rank 2: Execute no longer costs Rage. Rank 3: Execute generates 20 Rage. Rank 4: Damage increased by 15%.
When an enemy with a lot of health such as a heroic or raid boss gets below 20% health, both Fury and Arms warriors should change their rotation to spamming Execute. However it is worth refreshing [Colossus Smash] on the target whenever possible. For either spec, judicious use of [Berserker Rage] can increase output during an Execute phase. The more Rage available for Execute, the better.
Arms: Now costs 10 Rage, and consumes up to 30 additional Rage to deal additional damage. Sudden Death causes auto-attack hits to have a 10% chance to make the next Execute free and useable on any target, regardless of health level. These Executes do not consume additional Rage to deal additional damage.
Fury: Crazed Berserker now also causes Execute to hit with the off-hand weapon.
Patch 5.0.4 (2012-08-28): Can now be used in any stance and cost 30 Rage, up from 10. No longer consumes additional Rage for more damage.
Patch 4.0.3a (2010-11-23): Damage has been reduced by approximately 17%.
Patch 3.2.0 (2009-08-04): This ability now never costs more than a total of 30 rage. The tooltip for [Sudden Death] has been revised to remove reference to that maximum, since the ability now behaves that way even when untalented.
Patch 2.1.0 (2007-05-22): When used with [Sweeping Strikes], ranks 6 and 7 of this ability will no longer cause full damage to secondary targets who are not wounded.
Patch 1.3.0 (2005-03-07): Full rage is no longer consumed when the ability does not hit.