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Complete the Cataclysm Heroic dungeon achievements listed below.

Destroy 3 Siege Engines in a single Tol Barad battle.

Defeat the Lich King in Icecrown Citadel in 10-player Heroic mode.

Defeat the bosses of The Crimson Hall in Icecrown Citadel in 10-player Heroic mode.

Defeat the bosses of The Plagueworks in Icecrown Citadel in 10-player Heroic mode.

Defeat every boss in Icecrown Citadel in 10-player Heroic mode.

Defeat the bosses of The Frostwing Halls in Icecrown Citadel in 10-player Heroic mode.

Complete the 10-player raid achievements listed below.

Defeat Asaad in the Vortex Pinnacle 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.

Endure the nightmares of Iso'rath in the Twilight Highlands.

Defeat the Pit Lord Argaloth.

Win the battle for Tol Barad.