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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.

Complete the Cataclysm Heroic dungeon achievements listed below.

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 Vanessa VanCleef in Deadmines on Heroic Difficulty.

Do not gain more than one stack of Nauseated during the Cookie encounter in Deadmines on Heroic Difficulty.

Keep the Prototype Reaper from falling below 90% health at any time before the Foe Reaper 5000 is defeated in Deadmines on Heroic Difficulty.

Do not get hit by Fire Wall in the Glubtok encounter in Deadmines on Heroic Difficulty.

Defeat Salyis's Warband in Valley of the Four Winds.

Defeat Skadi the Ruthless in Utgarde Pinnacle on Heroic Difficulty after having killed Grauf from 100% to dead in a single pass.

Force Svala Sorrowgrave to kill a Scourge Hulk on Heroic Difficulty in Utgarde Pinnacle.

Damage Nefarian below 50% health before he lands for the final confrontation and then defeat Nefarian in Blackwing Descent.

Defeat the Omnotron Defense System in Blackwing Descent while neutralizing the following attacks.