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Defeat 60 Disciples within 10 seconds during the High Priestess Azil encounter in the Stonecore on Heroic Difficulty.

Defeat High Priestess Azil in the Stonecore on Heroic Difficulty.

Complete the Cataclysm Heroic dungeon achievements listed below.

Defeat Erudax without letting a Faceless Corruptor begin to cast Twilight Corruption on any of Alexstrasza's Eggs in Grim Batol on Heroic Difficulty.

Defeat Erudax in Grim Batol on Heroic Difficulty.

Defeat Erudax in Grim Batol.

Defeat General Umbriss while he is affected with Modgud's Malice in Grim Batol on Heroic Difficulty.

Defeat Ascendant Lord Obsidius without any party member reaching 4 stacks of Crepuscular Veil in Blackrock Caverns on Heroic Difficulty.

Defeat Ascendant Lord Obsidius in Blackrock Caverns on Heroic Difficulty.

Defeat Karsh Steelbender after he has reached 15 stacks of Superheated Quicksilver Armor in Blackrock Caverns on Heroic Difficulty.

Allow all three of Corla's zealots to evolve, then defeat Corla after slaying the evolved zealots in Blackrock Caverns on Heroic Difficulty.

Defeat Rom'ogg Bonecrusher after using his Skullcracker ability to kill 10 Angered Earth elementals in Blackrock Caverns on Heroic Difficulty.

Defeat an Unyielding Behemoth while you have the Tidal Surge effect during the Ozumat encounter in Throne of the Tides on Heroic Difficulty.

Defeat Ozumat in Throne of the Tides on Heroic Difficulty.

Get Lady Naz'jar to kill one of her minions with her Geyser ability in Throne of the Tides on Heroic Difficulty.