Realms of the Underdark | 
In the overworld, far above, animals kill so that they might eat and live. But the creatures that haunt the dark labyrinth beneath the face of Toril do not kill to live, for life itself is agony to them. They kill because they are driven to kill: by madness, by hatred, and by the foul atmosphere of evil that pervades every stone of this place. They kill because, only in killing, can they know release.
