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Defeat Yogg-Saron with the assistance of three or fewer Keepers in 10-player mode.

Defeat Yogg-Saron with the assistance of two or fewer Keepers in 10-player mode.

Defeat Yogg-Saron without any raid member going insane in 10-player mode.

Defeat every boss in Ulduar in 10-player mode.

Defeat the bosses of The Descent into Madness area of Ulduar in 10-player mode.

Defeat General Vezax after defeating the Saronite Animus in 10-player mode.

Obtain a Sinister Squashling pet and Hallowed Helm from the Hallow's end world events .

Use Weighted Jack-o'-Lanterns to put pumpkin heads on each of the races listed below.

Complete the Hallow's End achievements listed below.

Earn 10 honorable kills while under the influence of the G.N.E.R.D. buff. It's a slap in the face!

Complete one of the quests to save a village from the Headless Horseman.

Win Isle of Conquest while controlling the Quarry, Oil Refinery, Shipyard, Siege Workshop and Hangar.

Defeat Archimonde in The Battle for Mount Hyjal.

Defeat Onyxia without anyone taking damage from a Deep Breath in 10-player mode.

Defeat Onyxia in less than 5 minutes in 10-player mode.