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

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

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

Defeat Demidos, Devourer of Lights in Socrethar's Rise.

Wielder of the Fangs of the Father.

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

Complete the 25-player raid achievements listed below.

Kill 20 Mine Rats during the Helix Gearbreaker encounter in Deadmines on Heroic Difficulty.

Defeat Erudax without letting a Faceless Corruptor begin to cast Twilight Corruption on any of Alexstrasza's Eggs in Grim Batol on Heroic Difficulty.

Defeat Erudax in Grim Batol on Heroic Difficulty.

Defeat General Umbriss while he is affected with Modgud's Malice in Grim Batol on Heroic Difficulty.

Defeat 60 Disciples within 10 seconds during the High Priestess Azil encounter in the Stonecore on Heroic Difficulty.

Defeat Ascendant Lord Obsidius without any party member reaching 4 stacks of Crepuscular Veil in Blackrock Caverns on Heroic Difficulty.

Defeat Ascendant Lord Obsidius in Blackrock Caverns on Heroic Difficulty.

Defeat Karsh Steelbender after he has reached 15 stacks of Superheated Quicksilver Armor in Blackrock Caverns on Heroic Difficulty.