The Fires Down Below is the fourth (4) mission of the demo campaign and the second (2) mission of the custom campaign, Exodus of the Horde. Thrall, finding himself a prisoner of the murlocs in a cavern, combines forces with jungle trolls to escape. During their escape, Sen'jin was sacrificed by a Murloc Sorcerer and although it was killed the cave began to quake and the Horde had to escape.