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Defeat Chimaeron in Blackwing Descent on Heroic Difficulty.

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

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

Defeat Magmaw in Blackwing Descent without anyone in the raid becoming infected with a parasite.

Defeat Magmaw in Blackwing Descent on Heroic Difficulty.

Allow Necrotic Plague to stack to 30 before defeating the Lich King in 25-player mode.

Complete the 25-player raid achievements listed below.

Obtain a Grand Ice Mammoth.

Obtain an Ice Mammoth.

Defeat Yogg-Saron without the assistance of any Keepers in 10-player mode.

Defeat Yogg-Saron with the assistance of one or fewer Keepers in 10-player mode.

Defeat Yogg-Saron with the assistance of three or fewer Keepers in 10-player mode.

Defeat Yogg-Saron with the assistance of two or fewer Keepers in 10-player mode.

Complete the 10-player raid achievements listed below.

Defeat General Vezax after defeating the Saronite Animus in 10-player mode.