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Defeat the bosses of The Crimson Hall in Icecrown Citadel in 25-player mode.

Defeat the Blood Council without anyone in the raid taking more than 25,000 spell damage in a single hit in 25-player mode.

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

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

Enter every portal spawned by Valithria Dreamwalker before healing her to full health in 25-player mode.

Defeat Professor Putricide without using Regurgitated Ooze on the Abomination in 25-player mode.

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

Defeat Festergut while none of the players in your raid group ever had 3 stacks of Inoculated in 25-player mode.

Defeat Rotface without a Big Ooze casting Unstable Ooze Explosion in 25-player mode.

Defeat Lord Marrowgar without any raid member remaining impaled for more than 8 seconds in 25-player mode.

Complete the 10-player raid achievements listed below.

Defeat Malygos in 6 minutes or less in 10-player mode.

Defeat Malygos with fewer than 9 in 10-player mode.

Defeat Thaddius in Naxxramas without anyone in the raid crossing the negative and positive charges in 10-player mode.

Defeat Kel'Thuzad in Naxxramas while killing at least 18 abominations in his chamber in 25-player mode.