Kill Maexxna in Naxxramas within 20 minutes of Anub'Rekhan's death on Heroic Difficulty.

Defeat the bosses of The Military Quarter of Naxxramas on Heroic Difficulty.

With all three Twilight Drakes still alive, engage and defeat Sartharion the Onyx Guardian on Heroic Difficulty.

Defeat Sartharion the Onyx Guardian and the Twilight Drakes on Heroic Difficulty with fewer than 21.

Defeat Sapphiron on Heroic Difficulty in Naxxramas.

Defeat Thaddius in Naxxramas on Heroic Difficulty with less than 21 people.

Kill Patchwerk in Naxxramas in 3 minutes or less on Heroic Difficulty.

Defeat Loatheb in Naxxramas on Heroic Difficulty without killing any spores.

Defeat the bosses of The Arachnid Quarter of Naxxramas on Heroic Difficulty.

Defeat Heigan the Unclean in Naxxramas on Heroic Difficulty without anyone in the raid dying.

Defeat Malygos on Heroic Difficulty.

Defeat Kel'Thuzad on Heroic Difficulty in Naxxramas while killing at least 18 abominations in his chamber.

Defeat Malygos in 5 minutes or less on Heroic Difficulty.

Defeat Thaddius in Naxxramas on Heroic Difficulty without anyone in the raid crossing the negative and positive charges.

Defeat Sartharion the Onyx Guardian on Heroic Difficulty.

Defeat Sartharion the Onyx Guardian on Heroic Difficulty without getting hit by Lava Strike.

Defeat Malygos on Heroic Difficulty with fewer than 21.

With at least one Twilight Drake still alive, engage and defeat Sartharion the Onyx Guardian on Heroic Difficulty.

Defeat the bosses of Naxxramas with less than 21 people in the zone on Heroic Difficulty.

Defeat the bosses of The Plague Quarter of Naxxramas on Heroic Difficulty.

Defeat Sapphiron on Heroic Difficulty in Naxxramas without any member of the raid having a frost resist value over 100.

Defeat Kel'Thuzad on Heroic Difficulty in Naxxramas.

Defeat the bosses of The Construct Quarter of Naxxramas on Heroic Difficulty.

Defeat Grand Widow Faerlina in Naxxramas on Heroic Difficulty without dispelling frenzy.

Within one raid lockout period, defeat every boss in Naxxramas on Heroic Difficulty without allowing any raid member to die during any of the boss encounters.

Defeat the 4 Horsemen in Naxxramas on Heroic Difficulty, ensuring that they all die within 15 seconds of each other.

With at least two Twilight Drakes still alive, engage and defeat Sartharion the Onyx Guardian on Heroic Difficulty.

Defeat every boss in Naxxramas on Heroic Difficulty.

Deliver a killing blow to a Scion of Eternity while riding on a hover disk on Heroic Difficulty.