Onyxia's Lair is a small cave system located in the southern parts of Dustwallow Marsh. It is home to Onyxia and her guards, the remaining members of the insidious Black Dragonflight. There also her brood of new eggs is hidden, awaiting maturation. Should anyone ever threaten Onyxia within her lair - within distance of her precious eggs - her wrath would be terrible beyond comprehension.

Patch 3.0.2: Since Lady Katrana Prestor is no longer in game, the attunement is lifted for both factions. As such, it is no longer necessary to have the Drakefire Amulet in your inventory to enter.
Patch 3.2.2: Onyxia's Lair has been retuned for level 80 players because of World of Warcraft's 5th birthday.