- spirit realm - The place where the spirits of creatures and monsters inhabit. It is referred as to the alternate dimensions sometimes. The Spirits have a human partner. Sometimes humans can enter this place which are or most of the people who are able to see and communicate with Duel spirits and is the home of Daemons , Shamans also draw power form this world. http://yugioh.wikia.com/wiki/Duel_Monsters_Spirit_World