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Defeat Yogg-Saron with the assistance of three or fewer Keepers in 25-player mode.

Defeat Yogg-Saron without any raid member going insane in 25-player mode.

Complete the 25-player raid achievements listed below.

Defeat every boss in Ulduar in 25-player mode.

Defeat the bosses of The Descent into Madness area of Ulduar in 25-player mode.

Defeat Freya while she is affected by 25 stacks of Attuned to Nature in 25-player mode.

Defeat Freya within 20 minutes of the first creature you kill in the Conservatory of Life in 25-player mode.

Defeat the Assembly of Iron with Steelbreaker as the last member alive in 25-player mode.

Defeat the bosses of The Antechamber area of Ulduar in 25-player mode.

Defeat Thorim without any raid member being struck by Lightning Charge in 25-player mode.

Loot 25,000 gold.

Defeat Hodir without any raid member having more than 2 stacks of Biting Cold in 25-player mode.

Defeat Hodir without any raid member being hit by Flash Freeze in 25-player mode.

Defeat Kologarn without any raid member being hit by Focused Eyebeams in 25-player mode.

Defeat Kologarn without destroying either of his arms in 25-player mode.