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Defeat Algalon the Observer in Ulduar.

Defeat Algalon the Observer in 10-player mode.

Defeat Mimiron in Ulduar after activating his Self-Destruct mechanism.

Defeat the Keeper bosses of Ulduar.

Defeat Mimiron after activating his Self-Destruct mechanism in 10-player mode.

Defeat the Keeper bosses of Ulduar in 10-player mode.

Complete the Ulduar raid achievements listed below.

Defeat Hodir in Ulduar before he shatters his Rare Cache of Winter.

Defeat Hodir in Ulduar without letting any of the frozen adventurers perish.

Defeat Hodir in Ulduar without any raid member being hit by Flash Freeze.

Defeat Hodir before he shatters his rare cache in 10-player mode.

Defeat Hodir without any friendly NPC dying in 10-player mode.

Defeat Hodir without any raid member being hit by Flash Freeze in 10-player mode.

While fighting Thorim in Ulduar, force him into the arena before Sif departs.

When fighting Thorim in Ulduar, participate in killing the Ancient Rune Giant and the Runic Colossus.