Sunder Armor

Sunder Armor
	Sunder Armor; Level 16 warrior ability; Melee range; 15 Rage; Instant; Requires Melee Weapon; Sunders the target, causing [Weakened Armor].; ; Weakened Armor; Weakens the armor of the target by 4% for 30 sec. Stacks up to 3 times.;
Properties
Class	Warrior
School	Physical
Cooldown	None/Global Cooldown
Other information
Level learned	16
Improvements	[Glyph of Furious Sundering]
Related debuff
	; Weakened Armor ; Armor decreased by 4%. ; Duration: 30 seconds ;

Fury shatters what forges build.^[1]

Sunder Armor is one of the warrior's basic threat generation abilities. It is an instant attack that decreases your opponent's armor by 4% per stack. Sundering generates a high amount of threat, making it especially useful for tanking. Not only will it help you keep your opponent focused on you instead of your teammates, it will also increase the amount of damage you and your party members deal.

For Protection warriors, [Devastate] replaces Sunder Armor at level 26.

Improvements

Glyph of Furious Sundering
Major Glyph
Use: Permanently teaches you this glyph.

Reduces the cost of Sunder Armor by 100%.
Classes: Warrior
Requires Level 25
Sell Price: 1

Notes

Threat is still generated by using this ability when there are already 3 Weakened Armor stacked on the target.

Tips and tactics

As well as the obvious, and significant, armor reduction effect, Sunder Armor is a powerful tool for establishing and holding aggro as a main tank. It causes a solid amount of threat, and is not situational, like [Revenge], and has no extended cooldown, like [Shield Slam], so can be used over and over repeatedly as long as there is enough Rage. (Main Tanks usually have plenty of rage, due to the massive beatings they get.) However, Sunder Armor remains a less efficient (per rage used) way of generating threat than Shield Slam or Revenge.
The threat effect of Sunder Armor continues to occur even after the third stacked Weakened Armor debuff, so a tank can continue to reapply it after three sunders have stacked – it will still generate the same amount of threat, but will not stack past three debuffs. Reapplying Weakened Armor on a mob with a full stack of Weakened Armor will however reset the expiration timer for the Weakened Armor debuff stack.

Patch changes

Patch 6.0.2 (2014-10-14): Removed.
Patch 5.0.4 (2012-08-28): No longer causes additional threat.
Patch 4.0.1 (2010-10-12): Sunder Armor now stacks up to 3 times, down from 5.
Patch 3.1.0 (2009-04-14): Now reduces target armor by 4% per stack instead of static value, up to a maximum of 20% reduction.
Patch 3.0.2 (2008-10-14): Threat caused now scales with attack power.
Patch 1.6.0 (2005-07-12): Tooltip updated to indicate the additional threat caused by this ability. There have been no changes to the amount of threat caused.
Patch 1.1.0 (2004-11-07): Now available in all Stances.
Patch 0.9 (2004-08-17):
- Sundering Strike renamed Sunder Armor.
- No longer stacks with [Expose Armor], but will now stack with [Faerie Fire].
Patch 0.7 (2004-06-15): Changed to an instant ability.
Patch 0.6 (2004-04-13):
- [Defensive Stance] and Sundering Strike (Rank 1) have been removed from the trainers. These abilities are now available through quests.
- The values for Sundering Strike have been reduced.