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Defeat Sinestra in the Bastion of Twilight on Heroic Difficulty.

Defeat Cho'gall in the Bastion of Twilight before any raid member earns more than 30% Corrupted Blood.

Defeat Cho'gall in the Bastion of Twilight on Heroic Difficulty.

Complete the Cataclysm raid achievements listed below.

Defeat the bosses in the Bastion of Twilight.

Defeat the Elementium Monstrosity in the Bastion of Twilight while only allowing it to create a single Liquid Ice patch.

Defeat the Ascendant Council in the Bastion of Twilight on Heroic Difficulty.

Defeat Valiona and Theralion in the Bastion of Twilight on Heroic Difficulty.

Kill 6 Twilight Fiends in the Twilight Realm and then defeat Valiona and Theralion in the Bastion of Twilight.

Defeat Halfus Wyrmbreaker after defeating two drakes within 10 seconds of each other. The Emerald Whelp pack counts as one drake for this purpose.

Defeat Halfus Wyrmbreaker in the Bastion of Twilight on Heroic Difficulty.

Defeat Nefarian in Blackwing Descent on Heroic Difficulty.

Damage Nefarian below 50% health before he lands for the final confrontation and then defeat Nefarian in Blackwing Descent.

Defeat the bosses in Blackwing Descent.

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