I'll Take You All On (10 player)
Defeat Thorim, the Ancient Rune Giant and the Runic Colossus in 10-player mode.
10
I Have the Coolest Friends (10 player)
Defeat Hodir without any friendly NPC dying in 10-player mode.
10
The Antechamber of Ulduar (10 player)
Defeat the bosses of The Antechamber area of Ulduar in 10-player mode.
10
I Choose You, Stormcaller Brundir (10 player)
Defeat the Assembly of Iron with Stormcaller Brundir as the last member alive in 10-player mode.
10
A Quick Shave (10 player)
Defeat Razorscale without allowing her to fly into the air more than once in 10-player mode.
10
Orbital Bombardment (10 player)
Defeat Flame Leviathan with at least 1 Orbital Defense System active in 10-player mode.
10
Orbital Devastation (10 player)
Defeat Flame Leviathan with at least 2 Orbital Defense Systems active in 10-player mode.
10
Kel'Thuzad's Defeat (25 player)
Defeat Kel'Thuzad in Naxxramas in 25-player mode.
10
Sapphiron's Demise (25 player)
Defeat Sapphiron in Naxxramas in 25-player mode.
10
Kel'Thuzad's Defeat (10 player)
Defeat Kel'Thuzad in Naxxramas in 10-player mode.
10
Sapphiron's Demise (10 player)
Defeat Sapphiron in Naxxramas in 10-player mode.
10
The Hundred Club (10 player)
Defeat Sapphiron in Naxxramas without any member of the raid having a frost resist value over 100 in 10-player mode.
10
Shutout (10 player)
Defeat Flame Leviathan without causing a System Shutdown in 10-player mode.
10