After Draenor went through the events that precipitated because of the The Cipher of Damnation and the disaster involving the huge explosion, many of the intelligent native species went extinct. The survivors were either corrupted or degraded like the Lost Ones. However, two intelligent races not only managed to survive, but gradually managed to prosper in this broken place. They eventually became powerful forces that held influence over this area. These were the Mag'har Orcs and the Arakkoa.
Compared to the brown-skinned Orcs, the Arakkoa's eccentric appearance, mysterious magic and sensational legends were far more interesting to the players.
The creatures that were present in Sethekk Halls would be enough to satisfy the players' curiosity.
"Hoho, it's time to go, let's goo~~"
The first Boss, Dark Weaver Seth, was a prefect representation of the Arakkoa's alternative looks and behaviour.