Onyxia's Lair » Zones » WoW Armory Light

Onyxia's Lair is a small cave system located in the southern parts of Dustwallow Marsh, and is patrolled by flying Scorchscale Drakes. It is home to Onyxia and some of her minions, and is a 40-man raid instance. 

Prior to Patch 3.0.2, it was necessary to have the Drakefire Amulet either equipped or in your inventory in order to enter.

Onyxia's lair is in a volcanic cave in Dustwallow Marsh. The floor of the main cavern is just solid enough that Onyxia can sit on it normally without cracking the floor and revealing the lava below. This is intentional; if seriously threatened, she shatters the floor, exposing the lava to further damage her enemies. She has over one hundred eggs in her clutch, but her mate is unknown.