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

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 General Vezax after defeating the Saronite Animus in 25-player mode.

Defeat Mimiron after activating his Self-Destruct mechanism in 25-player mode.

Complete the 25-player raid achievements listed below.

Defeat the Keeper bosses of Ulduar in 25-player mode.

Defeat Freya while leaving all 3 Elders alive in 25-player mode.

Defeat Freya while leaving at least 2 Elders alive in 25-player mode.

Defeat Freya while leaving at least 1 Elder alive 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 Thorim while Sif is present in 25-player mode.

Defeat Thorim, the Ancient Rune Giant and the Runic Colossus in 25-player mode.

Defeat Thorim in Ulduar while Sif is present.