1) Forgotten Realms character 
Errtu is a balor, a true tanar`ri (chaotic evil demon) in the Dungeons & Dragons role-playing game, chiefly in the Forgotten Realms campaign setting. Errtu was featured as a villain of the first book in the Icewind Dale trilogy, The Crystal Shard by R. A. Salvatore, and the main villain of Passage to Dawn, the final book in Salvatore`s Legacy of.....