Patch 7.1.0 (2016-10-25): Now deals 200% of your missing health in damage to 4 nearby enemies, up to 120% of your maximum health.
Patch 7.0.3 (2016-07-19): Redesigned as a level 100 Retribution talent (was a level 20 Protection ability). Deals Holy damage to up to 4 enemies within 10 yards equal to 200% of your missing health. Deals 50% of missing health against enemy players.
Old: Sends bolts of power in all directions, causing (200% of spell power) Holy damage divided among all enemies within 10 yards, stunning Demons and Undead for 3 sec.
Patch 6.0.2 (2014-10-14): Damage has been increased by 100%, and its cooldown increased to 15 seconds (up from 9 seconds).
Hotfix (2012-12-03):Damage dealt by Holy Wrath now scales properly with Attack Power and Spell Power.
Hotfix (2012-10-01):Holy Wrath now deals 100% more damage.
Patch 5.0.4 (2012-08-28): Now a level 20 Protection specialization ability (was a level 28 ability for all paladins). New icon.
Patch 4.0.1 (2010-10-12): No longer uses ranks. Now learned at level 28 (was 50). Affected by new talents, along with the new resource Holy Power.
Hotfix (2009-09-09):We just deployed a hotfix to modify Holy Wrath so this spell has the same diminishing return mechanics that other player stun spells and abilities currently have. This will prevent Undead creatures that we wish to be susceptible to stun from being permanently stunned if you include enough Paladins in your raid who then rotate their Holy Wrath casts.This will affect the difficulty of Anub'arak, but we didn't want the "right way" to defeat this fight to involve bringing five Paladins who glyphed their Holy Wrath spell.
Patch 3.0.2 (2008-10-14): Holy Wrath is now instant cast, causes a 3 second stun, cooldown reduced to 30 seconds, radius reduced to 10 yards.