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

Defeat Lord Marrowgar without any raid member remaining impaled for more than 8 seconds in 25-player 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 the bosses of The Plagueworks in Icecrown Citadel in 10-player Heroic mode.

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

Defeat Halion in The Ruby Sanctum in 10-player mode.

Defeat Professor Putricide without using Regurgitated Ooze on the Abomination in 10-player mode.

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

Defeat 25 Dark Rune Guardian Dwarves with Razorscale's Flame Breath in Ulduar.

Defeat 25 Dark Rune Guardian Dwarves with Razorscale's Flame Breath in 10-player mode.

Defeat Thorim in Ulduar while Sif is present.

When fighting Thorim in Ulduar, participate in killing the Ancient Rune Giant and the Runic Colossus.

Defeat Thorim while Sif is present in 10-player mode.

Defeat Thorim, the Ancient Rune Giant and the Runic Colossus in 10-player mode.