On Console version the ghost can fill in areas of the map. This can reveal chests, ores and other things. Might be worth mentioning? --139.218.220.79 20:21, 22 December 2013 (UTC)
There is now a Master Mode enemy called "Ghost" introduced in 1.4.0.1, so we'll probably need a disambiguation AevumDecessus (talk) 18:54, 16 May 2020 (UTC)