Blackwing Descent is a raid instance introduced in World of Warcraft: Cataclysm. The entrance to the raid instance is close to Nefarian's throne in Blackwing Lair and is accessible by flying to the throne on the eastern side of Blackrock Mountain. It features Nefarian as a boss, who returned from the assault on his lair and retreated further into the spire. Blackwing Descent, along with Bastion of Twilight and Throne of the Four Winds, is meant to be the "Naxxramas" of Cataclysm: entry level raiding.