Defeat the bosses in Utgarde Keep.

Defeat the bosses in The Halls of Reflection.

Defeat the bosses in The Pit of Saron.

Defeat the bosses in The Nexus.

Defeat the bosses in Caverns of Time: Stratholme.

Defeat the bosses in Gundrak.

Defeat Cyanigosa in The Violet Hold.

Defeat the bosses in the Trial of the Champion.

Defeat the bosses in Utgarde Pinnacle.

Defeat the bosses in Drak'Tharon Keep.

Defeat the bosses in Ahn'kahet: The Old Kingdom.

Defeat the bosses in Halls of Lightning.

Defeat the bosses in Azjol-Nerub.

Defeat the boss encounters in Halls of Stone.

Defeat the bosses in The Forge of Souls

Clear the hallway before Scourgelord Tyrannus in The Pit of Saron on Heroic Difficulty without anyone taking icicle damage on the first try.

Defeat The Oculus bosses on Heroic Difficulty while Defense Protocol Gamma is active.

On three different visits to The Oculus, get credit for defeating Ley-Guardian Eregos while riding an Amber, Emerald, and Ruby drake on Heroic Difficulty.

Defeat Gal'darah in Gundrak on Heroic Difficulty while under the effects of Eck Residue.

Defeat Moorabi in Gundrak on Heroic Difficulty while preventing him from transforming into a mammoth at any point during the encounter.

Defeat Ley-Guardian Eregos in The Oculus on Heroic Difficulty without anyone in your party using an Emerald Drake.

Defeat Jedoga Shadowseeker in Ahn'kahet on Heroic Difficulty without killing any Twilight Volunteers.

Defeat Hadronox in Azjol-Nerub on Heroic Difficulty before he webs the top doors and prevents more creatures from spawning.

Defeat Zuramat the Obliterator in The Violet Hold on Heroic Difficulty without killing any void sentries.

Defeat Keristrasza in The Nexus on Heroic Difficulty without allowing Intense Cold to reach more than two stacks.

Defeat Anomalus in The Nexus on Heroic Difficulty without destroying any Chaotic Rifts.

Defeat Ley-Guardian Eregos in The Oculus on Heroic Difficulty without anyone in your party using an Amber Drake.

Defeat Ley-Guardian Eregos in The Oculus on Heroic Difficulty within 20 minutes of Drakos the Interrogator's death.

Force Svala Sorrowgrave to kill a Scourge Hulk on Heroic Difficulty in Utgarde Pinnacle.

Engage King Dred in Drak'Tharon Keep on Heroic Difficulty and slay 6 Drakkari Gutrippers or Drakkari Scytheclaw during his defeat.

Defeat General Bjarngrim in the Halls of Lightning on Heroic Difficulty while he has a Temporary Electrical Charge.

Defeat the Maiden of Grief in the Halls of Stone on Heroic Difficulty in 1 minute or less.

Defeat Novos the Summoner in Drak'Tharon Keep on Heroic Difficulty without allowing any undead minions to reach the floor.

Defeat King Ymiron in Utgarde Pinnacle on Heroic Difficulty without anyone in the party triggering Bane.

Defeat Skadi the Ruthless in Utgarde Pinnacle on Heroic Difficulty after having killed Grauf from 100% to dead in a single pass.

Defeat Skadi the Ruthless in Utgarde Pinnacle on Heroic Difficulty within 3 minutes of starting the gauntlet event.

Defeat Anub'arak in Azjol-Nerub on Heroic Difficulty in 4 minutes or less.

Defeat The Oculus bosses on Heroic Difficulty.

Defeat the bosses in The Oculus.