Feedback (priest ability)

Feedback
	Feedback (6 ranks); Level 20 priest ability; 705 Mana; 3 min cooldown; Instant; The priest becomes surrounded with anti-magic energy. Any successful spell cast against the priest will burn X of the attacker's Mana, causing 1 Shadow damage for each point of Mana burned. Lasts 15 sec.;
Properties
Class	Priest
Race	Human
School	Shadow
Cooldown	3 minutes
Other information
Level learned	20
Improvements	[Mental Agility]
Related buff
	Magic ; Feedback ; Anti-magic energy will burn X of the attacker's Mana, causing 1 Shadow damage for each point of Mana burned. ; Duration: 15 seconds ;

Feedback is a Human priest racial ability. When active, any spell cast against the priest will burn the enemy's mana and damage them.

Rank table

Rank	Level	Mana Cost	Description	Cost
1	20	140	Burns 18 mana per spell cast.	90
2	30	245	Burns 35 mana per spell cast.	4 50
3	40	355	Burns 54 mana per spell cast.	8 10
4	50	470	Burns 77 mana per spell cast.	13 50
5	60	580	Burns 105 mana per spell cast.	20 91
6	70	710	Burns 165 mana per spell cast.	58 50

Feedback's damage cannot proc [Blackout], nor will it add [Shadow Weaving] stacks.
The mana drain effect can be reduced by resilience. Additionally, the damage taken can be further reduced by shadow resistance.

Although Feedback is a highly situational spell (both due to the duration and cooldown), it can be extremely useful in some situations. For example, a mage's [Pyroblast] can be successfully countered by quickly casting [Power Word: Shield] and Feedback.
This spell appears to proc on every tick of a channeled spell. Because of this, using it when attacked by channeled spells is a very fast and mana efficient way to hurt an enemy caster's mana, channel time, and health.

In Warcraft III: The Frozen Throne, Feedback was an ability used by human arcane towers and blood elf Spellbreakers with similar effects on mana using units.
Prior to patch 1.10.0, this was a temporary weapon buff that gave weapon swings a chance to drain mana and deal an equal amount of shadow damage per mana drained.

Patch 3.0.2 (2008-10-14): Removed.
Patch 1.10.0 (2006-03-28): Redesigned. The priest surrounds himself with anti-magic energy. Any successful spell cast against the priest will burn mana from the attacker and cause Shadow damage.
Patch 1.5.0 (2005-06-07): Casting a higher rank of the spell will now replace an existing, lower level effect.
Patch 1.1.0 (2004-11-07): Added.

Rank 1	Rank 2	Rank 3	Rank 4	Rank 5
Wowhead WoWDB	Wowhead WoWDB	Wowhead WoWDB	Wowhead WoWDB	Wowhead WoWDB

Feedback
Feedback (6 ranks) Level 20 priest ability 705 Mana 3 min cooldown Instant The priest becomes surrounded with anti-magic energy. Any successful spell cast against the priest will burn X of the attacker's Mana, causing 1 Shadow damage for each point of Mana burned. Lasts 15 sec.
Properties
Class	Priest
Race	Human
School	Shadow
Cooldown	3 minutes
Other information
Level learned	20
Improvements	[Mental Agility]
Related buff
Magic Feedback Anti-magic energy will burn X of the attacker's Mana, causing 1 Shadow damage for each point of Mana burned. Duration: 15 seconds