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Defeat Yogg-Saron without any raid member going insane in 10-player mode.

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

Kill every Vile Spirit that spawns before it explodes and then defeat the Lich King in 10-player mode.

Logged in during WoW's 7th Anniversary.

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 Blood-Queen Lana'thel once as a vampire and again without becoming a vampire in 10-player mode.

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

Defeat the first four bosses in Icecrown Citadel in 10-player Heroic mode.

Defeat every boss in the Trial of the Grand Crusader in 10-player Heroic mode.

Defeat every boss in the Trial of the Crusader in 10-player mode.

Defeat the Twin Val'kyr in 3 minutes or less in 10-player mode.

Kill all the enemy heroes within 60 seconds of the first one dying in 10-player mode.

Defeat Lord Jaraxxus while at least two Mistresses of Pain are alive in 10-player mode.