Siffed (25 player)
Force Thorim to enter the arena while Sif is present in 25-player mode.
10
Staying Buffed All Winter (25 player)
Possess the effects of Toasty Fire, Storm Power and Starlight at the same time in 25-player mode.
10
The Antechamber of Ulduar (25 player)
Defeat the bosses of The Antechamber area of Ulduar in 25-player mode.
10
I Choose You, Stormcaller Brundir (25 player)
Defeat the Assembly of Iron with Stormcaller Brundir as the last member alive in 25-player mode.
10
Nerf Gravity Bombs (25 player)
Defeat XT-002 Deconstructor without any raid member dying from a Gravity Bomb in 25-player mode.
10
Must Deconstruct Faster (25 player)
Defeat XT-002 Deconstructor in 205 seconds in 25-player mode.
10
The Siege of Ulduar (25 player)
Defeat the bosses of The Siege area of Ulduar in 25-player mode.
10
A Quick Shave (25 player)
Defeat Razorscale without allowing her to fly into the air more than once in 25-player mode.
10
Stokin' the Furnace (25 player)
Defeat Ignis the Furnace Master in 4 minutes in 25-player mode.
10
Orbit-uary (25 player)
Defeat Flame Leviathan with 4 Orbital Defense Systems active in 25-player mode.
10
Nuked from Orbit (25 player)
Defeat Flame Leviathan with 3 Orbital Defense Systems active in 25-player mode.
10
Orbital Devastation (25 player)
Defeat Flame Leviathan with 2 Orbital Defense Systems active in 25-player mode.
10
Orbital Bombardment (25 player)
Defeat Flame Leviathan with 1 Orbital Defense System active in 25-player mode.
10
Dwarfageddon (25 player)
Destroy 100 Steelforged Defenders in 10 seconds on the Ulduar gauntlet in 25-player mode.
10
The Keepers of Ulduar (10 player)
Defeat the Keeper bosses of Ulduar in 10-player mode.
10
Knock on Wood (10 player)
Defeat Freya while leaving at least 1 Elder alive in 10-player mode.
10
Knock, Knock on Wood (10 player)
Defeat Freya while leaving at least 2 Elders alive in 10-player mode.
10
Knock, Knock, Knock on Wood (10 player)
Defeat Freya while leaving all 3 Elders alive in 10-player mode.
10
Lose Your Illusion (10 player)
Defeat Thorim while Sif is present in 10-player mode.
10
I'll Take You All On (10 player)
Defeat Thorim, the Ancient Rune Giant and the Runic Colossus in 10-player mode.
10
Siffed (10 player)
Force Thorim to enter the arena while Sif is present 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 Have the Coolest Friends (10 player)
Defeat Hodir without any friendly NPC dying in 10-player mode.
10
I Choose You, Steelbreaker (10 player)
Defeat the Assembly of Iron with Steelbreaker as the last member alive in 10-player mode.
10
Can't Do That While Stunned (10 player)
Defeat the Assembly of Iron without allowing Stormcaller Brundir to damage anyone with Chain Lightning or Lightning Whirl in 10-player mode.
10
The Siege of Ulduar (10 player)
Defeat the bosses of The Siege area of Ulduar in 10-player mode.
10
Nerf Gravity Bombs (10 player)
Defeat XT-002 Deconstructor without any raid member dying from a Gravity Bomb in 10-player mode.
10
Nerf Engineering (10 player)
Defeat XT-002 Deconstructor without him recovering any health from XS-013 in 10-player mode.
10
Must Deconstruct Faster (10 player)
Defeat XT-002 Deconstructor in 205 seconds 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
Stokin' the Furnace (10 player)
Defeat Ignis the Furnace Master in 4 minutes in 10-player mode.
10
Hot Pocket (10 player)
Survive being thrown into Ignis the Furnace Master's Slag Pot 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
Nuked from Orbit (10 player)
Defeat Flame Leviathan with at least 3 Orbital Defense Systems active 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
Orbit-uary (10 player)
Defeat Flame Leviathan with all 4 Orbital Defense Systems active in 10-player mode.
10
Onyxia's Lair (10 player)
Defeat Onyxia in 10-player mode.
10
More Dots! (10 player)
Defeat Onyxia in less than 5 minutes in 10-player mode.
10
She Deep Breaths More (10 player)
Defeat Onyxia without anyone taking damage from a Deep Breath in 10-player mode.
10
Onyxia's Lair (25 player)
Defeat Onyxia in 25-player mode.
10
More Dots! (25 player)
Defeat Onyxia in less than 5 minutes in 25-player mode.
10