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Defeat the bosses of Naxxramas with less than 21 people in the zone in 25-player mode.

Defeat Heigan the Unclean in Naxxramas without anyone in the raid dying in 25-player mode.

Defeat every boss in Naxxramas in 25-player mode.

Defeat the bosses of The Military Quarter of Naxxramas in 25-player mode.

Kill Maexxna in Naxxramas within 20 minutes of Anub'Rekhan's death in 25-player mode.

Defeat every boss in Icecrown Citadel in 25-player Heroic mode.

Kill every Vile Spirit that spawns before it explodes and then defeat the Lich King in 25-player mode.

Defeat the Lich King in Icecrown Citadel in 25-player Heroic mode.

Defeat the bosses of The Frostwing Halls in Icecrown Citadel in 25-player Heroic mode.

Defeat Sindragosa in 25-player mode without any member of your raid receiving more than 5 stacks of Mystic Buffet.

Defeat the first four bosses in Icecrown Citadel in 25-player Heroic mode.

Complete the classic raid achievements listed below.

Defeat C'Thun.

Save all four prisoners before they are sacrificed in Zul'Aman on Heroic Difficulty.

Defeat the bosses of The Plagueworks in Icecrown Citadel in 25-player Heroic mode.