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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.

Obtain Mimiron's Head from 25-player Yogg-Saron with no Keepers assisting you.

Research all your Class Hall Upgrades.

Defeat Auriaya without destroying her Sanctum Sentries in 25-player mode.

Kill all the enemy heroes within 60 seconds of the first one dying in 10-player mode.

Defeat Hodir in Ulduar without any raid member ever gaining more than 2 stacks of Biting Cold.

Defeat Hodir without any raid member having more than 2 stacks of Biting Cold in 25-player mode.

Defeat Kologarn in Ulduar without any raid member being hit by Focused Eyebeams.

Defeat Kologarn in Ulduar without destroying either of his arms.

Defeat Kologarn without any raid member being hit by Focused Eyebeams in 25-player mode.

Defeat Kologarn without destroying either of his arms in 25-player mode.

Defeat Flame Leviathan on the first try without anyone repairing their vehicle in 25-player mode.

Defeat Onyxia without anyone taking damage from a Deep Breath in 25-player mode.

Defeat Onyxia in less than 5 minutes in 25-player mode.