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Defeat Chimaeron in Blackwing Descent on Heroic Difficulty.

Defeat Atramedes in Blackwing Descent without any raid member's sound bar going over 50%.

Defeat Atramedes in Blackwing Descent on Heroic Difficulty.

Defeat the bosses in Blackwing Descent.

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

Defeat Maloriak in Blackwing Descent on Heroic Difficulty.

Defeat Magmaw in Blackwing Descent on Heroic Difficulty.

Defeat the Omnotron Defense System in Blackwing Descent on Heroic Difficulty.

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

Complete the 25-player raid achievements listed below.

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

Defeat Freya while leaving all 3 Elders alive 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 in Ulduar while Sif is present.

Defeat Thorim while Sif is present in 25-player mode.