Players will face off against the Ogre Highlord Omokk, the Dragonkin General Drakkisath, and the Orc Rend Blackhand. They won’t be doing it for the sheer fun but for several new card rewards, including the Rend Blackhand legendary card.
Beating the wing will unlock class challenges for Priests and Druids as well as the heroic mode.
[Source: Hearthstone, Polygon walkthrough]