Talk:Doppel Luka/@comment-12157614-20130715230455/@comment-98.207.226.239-20130718225512

Depends on the mythos. Orkney has them as a type of fairy that kidnap newborns. Vikings had them as basically "pre-death" ghosts called vardogers. Generally the term is pretty broad since the idea of "evil twins" can encompasse a lot of different possibilities when you include magical or mythological beings.