Onyxia (Blackwing Descent)

Onyxia is a sub-boss fought during phase one of the Nefarian encounter in Blackwing Descent.

When players engage Nefarian, as Lord Victor Nefarius, he will reveal that he has found a way to raise Onyxia from the dead. A platform then rises from the lava in the middle of the vault with Onyxia's stitched-together form lying on it, and she is restored to a semblance of life via bolts of electricity. The first phase of the Nefarian fight consists of trying to kill Onyxia while also managing Nefarian, who will attack the raid after a brief respite.