The realm of the dead is as the word says, dead, but many have picked up ancient Greek myths or even older pagan mysteries and made them beliefs such as Purgatory, Limbo and Hades. It comes from the worship of the dead or ancestor worship which involve addressing prayers or offerings to the spirits of the dead. It existed among the ancient Greeks, other ancient people. The practice of worship for the dead and praying to them, or making prayer or offerings on behalf of the dead to contribute to their afterlife purification is not scriptural and in fact is forbidden in the Bible.
Deuteronomy 18
10 There shall not be found among you any one that maketh his son or his daughter to pass through the fire, or that useth divination, or an observer of times, or an enchanter, or a witch.11 Or a charmer, or a consulter with familiar spirits, or a wizard, or a necromancer.12 For all that do these things are an abomination unto the Lord: and because of these abominations the Lord thy God doth drive them out from before thee.
Purgatory is the belief that presupposes that the dead can be assisted between death and their entry into their final abode. Purgatory is given as a way that no matter how sinful or unbelieving, when you die, you go to Purgatory and get things sorted out and finally get to heaven, so no acceptance of Christ is needed, you can buy your way in. In ancient Egypt in the worship of the dead, substantially the same doctrine of purgatory was taught as today and its priests created grand funerals and masses for the dead, along with celebration of prayer and other services for the dead.
Deuteronomy 18
10 There shall not be found among you any one that maketh his son or his daughter to pass through the fire, or that useth divination, or an observer of times, or an enchanter, or a witch.11 Or a charmer, or a consulter with familiar spirits, or a wizard, or a necromancer.12 For all that do these things are an abomination unto the Lord: and because of these abominations the Lord thy God doth drive them out from before thee.
Purgatory is the belief that presupposes that the dead can be assisted between death and their entry into their final abode. Purgatory is given as a way that no matter how sinful or unbelieving, when you die, you go to Purgatory and get things sorted out and finally get to heaven, so no acceptance of Christ is needed, you can buy your way in. In ancient Egypt in the worship of the dead, substantially the same doctrine of purgatory was taught as today and its priests created grand funerals and masses for the dead, along with celebration of prayer and other services for the dead.