The Dank Cave is a small, unmarked dungeon found in the Wounded Coast.
Hawke will first encounter a group of spiders at the entrance. Soon after, there is some Raw Lyrium, a crafting material. Finally, there is a dragon guarding piles of treasure and an Evil Tome. Performing any action with the Evil Tome will result in several abominations, corpses, and a revenant being spawned.
Quests EditForbidden Knowledge
Notable items EditEvil Tome