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Boned (25 player)
Defeat Lord Marrowgar without any raid member remaining impaled for more than 8 seconds in 25-player mode.
Boned (25 player) requires you to defeat Lord Marrowgar in 25-player mode without any raid member remaining impaled on a Bone Spike for more than 8 seconds.
Use Three Tanks
Enter Icecrown Citadel and assign three tanks to Lord Marrowgar. The tanks handle the boss normally, shifting left and right to avoid Coldflame, absorbing most of the flame damage.
Stack Inside Melee Range
All players, including ranged DPS, collapse and stand inside the melee box directly on Lord Marrowgar. When he begins casting Bone Spike Graveyard, any players outside (such as Hunters) must immediately collapse into melee range as well.
Ignore Fire Movement
Because all players are stacked tightly in melee range, Coldflame spawns behind the group rather than through it, meaning nobody needs to reposition to avoid fire.
Instantly Kill Bone Spikes
With all players stacked together, Bone Spikes are trivial to reach and destroy immediately, ensuring no impaled player remains spiked for more than 8 seconds and securing the achievement.
Tips
See the video guide for a visual walkthrough of the stacking strategy.