The Odd-looking Key, also known as Odd Looking Key in BG, can be found within the 1st level of the dungeon in Durlag's Tower. It is necessary for opening a warded chest on the same level. Inside the chest are several items of treasure and some gold, along with the Switch for an Engine, which is needed to activate the nearby steam engine. Players should be careful not to put the key into the warded chest, or the chest will be locked along with all items inside without any means except console to open it.