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Defeat The Prophet Tharon'ja on Heroic Difficulty while in a guild group.

Defeat King Ymiron on Heroic Difficulty while in a guild group.

Defeat Ingvar the Plunderer on Heroic Difficulty while in a guild group.

Defeat Mal'Ganis on Heroic Difficulty while in a guild group.

Defeat Aeonus on Heroic Difficulty while in a guild group.

Complete the heroic Burning Crusade dungeon achievements listed below while in a guild group.

Defeat Epoch Hunter on Heroic Difficulty while in a guild group.

Defeat Exarch Maladaar on Heroic Difficulty while in a guild group.

Defeat Talon King Ikiss on Heroic Difficulty while in a guild group.

Defeat Nexus-Prince Shaffar on Heroic Difficulty while in a guild group.

Defeat Murmur on Heroic Difficulty while in a guild group.

Defeat Harbinger Skyriss on Heroic Difficulty while in a guild group.

Defeat Warp Splinter on Heroic Difficulty while in a guild group.

Defeat Pathaleon the Calculator on Heroic Difficulty while in a guild group.

Defeat The Black Stalker on Heroic Difficulty while in a guild group.