Launches a volley of holy light at the target, causing [(190% of spell power) * 3] Holy damage to an enemy or [(300% of Spell power) * 3] healing to an ally over 2 sec. Castable while moving.
It was re-implemented in the Saviors of Uldum expansion as a common Priest spell. Its flavor text reads: "This is what happens when you don’t give a sincere apology."
Hotfix (2016-08-26):Penance damage is now 190% of Spell Power (was 175%).
Hotfix (2016-08-22):Penance mana cost has been reduced to 2.8% base mana (was 3%).
Patch 7.0.3(2016-07-19): No longer does direct healing but can be cast while moving. Damage increased by 369%.
Patch 5.3.0(2013-05-21): Now deals 10% less damage, but healing done is increased by 10%.
Patch 5.2.0(2013-03-05): Damage and healing has been increased by 20%, now a cooldown of 9 seconds (was 10 seconds), and has a range of 40 yards for both friendly and hostile targets (was 40 yards for friendly and 30 yards for hostile targets).
Hotfix (2012-09-18):Penance's base damage has been reduced so that it now deals significantly less damage at lower player levels, and slightly less damage at level-85.
Patch 5.0.4(2012-08-28): Damage increased by approximately 300%. Cooldown reduced from 12 sec to 10 sec.
Patch 4.0.6(2011-02-08): Mana cost has been increased by 7%, but healing has been increased by 20%.
[Castigation], 
[Grace], 
[The Penitent]
[Power Word: Shield] prevents pushback and ensures that the effect of Penance is fully used.
