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Defeat Mimiron in Ulduar without anyone in the raid being hit by the following:

Defeat Mimiron without anyone in the raid being hit by the following in 25-player mode.

Kill the enemy who is carrying your flag in the opposing team's flag room while the opposing team's flag is at their base, within their control.

Logged in during WoW's 11th Anniversary.

Defeat Nefarian in Blackwing Descent on Heroic Difficulty.

Defeat Maloriak in Blackwing Descent on Heroic Difficulty.

Defeat Atramedes in Blackwing Descent on Heroic Difficulty.

Defeat Chimaeron in Blackwing Descent on Heroic Difficulty.

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

Defeat Magmaw in Blackwing Descent on Heroic Difficulty.

Defeat Acidmaw and Dreadscale within 10 seconds of each other in 25-player mode.

Defeat Kel'Thuzad in Naxxramas while killing at least 18 abominations in his chamber in 25-player mode.

Complete the 25-player raid achievements listed below.

Defeat Thaddius in Naxxramas without anyone in the raid crossing the negative and positive charges in 25 player mode.

Defeat Halion in The Ruby Sanctum in 25-player Heroic mode.