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Defeat the Pit Lord Argaloth.

Defeat Cho'gall in the Bastion of Twilight before any raid member earns more than 30% Corrupted Blood.

Kill 12 Aberrations within 10 seconds on the Maloriak encounter in Blackwing Descent and then defeat Maloriak.

Defeat the Omnotron Defense System in Blackwing Descent while neutralizing the following attacks.

Defeat Al'Akir in the Throne of the Four Winds while he is affected by Feedback.

Defeat the Conclave of Wind in the Throne of the Four Winds while everyone in the raid has at least 7 stacks of Wind Chill.

Defeat Yogg-Saron in Ulduar without the assistance of any Keepers.

Defeat Yogg-Saron in Ulduar with the assistance of one or fewer Keepers.

Defeat Yogg-Saron in Ulduar with the assistance of two or fewer Keepers.

Defeat Yogg-Saron without the assistance of any Keepers in 25-player mode.

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

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

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

Defeat Yogg-Saron within 7 minutes in 25-player mode.

Defeat every boss in Ulduar in 25-player mode.