Warbringer O'mrogg Tactics - Shattered Halls Instance How To

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The Two-Headed Beast

Don’t be fooled, O’mrogg is your average stupid ogre, and in this case two heads aren’t better than one. In fact, they’re his downfall. With the two heads constantly arguing and bickering with each other O’mrogg becomes highly unpredictable, switching targets based on which head decides to take over the body for that moment.



Thunderclap - Deals 938-1062 nature damage, reducing the players attack and movement speed by 35% for 10 seconds.

Blast Wave - Deals approximately 2550-2850 fire damage in AoE.

Fear - Causes target to flee for three seconds.

Burning Maul - Chance on hit: Add 1000 fire damage to attack.

Beatdown - Chooses a new player to attack and wipes the threat table.


Burning Maul - Deals significantly higher damage.

Beatdown - Adds 3000-3500 fire damage to this ability.

The Fight

It would be an understatement of epic proportions if I were to tell you that this is an aggro-sensitive fight. It goes far beyond that. O’mrogg is immune to Taunt (not just the Warrior’s taunt, all forms), dumps aggro frequently, hits hard, blastwaves your whole group, and drops AoE fear-bombs for added fun.

There are two methods to conquer his madness. You can deal with the fight slowly, meaning everything is carefully controlled, the tank is given a really long introduction for aggro-building, and DPS is gentle. You might find, though, that with the aggro dump and random attacks that slower may not be better. Most of the time, success results when everyone forgets about the aggro table and tries to kill the jerk as fast as possible. It may be beneficial to mind your threat when the fight begins, before the first aggro-dump. Let the tank build for a few seconds, then lay into him. Whenever the DPS feels they have a good opportunity, they should lay into him with everything they have. It is better for O’mrogg to chase a DPS class than for him to chase a healer - and trust me, he will pretty much always be chasing somebody. Complete threat drops work for the targeted player as well. If you need to drop him back onto the tank (or the overzealous DPS), Vanish, Iceblock, Feign Death, Hand of Protection and Divine Shield are entirely effective. The main things you should remember are to attempt to stay out of range of Blast Nova, keep anti-fear effects on the tank, (Deathwish, Fear Ward, Tremor Totem) and be prepared to drop aggro. Other than that, its a pretty fun fight.

This post is part of the series: World of Warcraft Instance Guide: The Shattered Halls

The Shattered Halls is a challenging instance, both on Normal and Heroic modes. However, with the right group composition and clever tactics, it doesn’t have to be difficult. A-Z on busting open the Shattered Halls.

  1. World of Warcraft Instance Guide: The Key to the Shattered Halls
  2. The Shattered Halls: Group Composition and Tactics
  3. The Shattered Halls - Trash and Trouble
  4. The Shattered Halls - Running the Gauntlets
  5. The Shattered Halls: Taking Grand Warlock Nethekurse Down a Peg
  6. The Shattered Halls: Warbringer O’mrogg
  7. The Shattered Halls: Kargath Bladefist