God warned Isreal not to practice any of the religious customs of the nations around them and that included spiritism as Deut 18:9-10 says to keep away from anyone who employs divination, a practicer of magic or anyone who looks for omens or a sorcerer.
According to the NT they are works of the demons and of the fallen flesh. Galatians 5:19-21.
Deut 18:9-10 , lets look at the broader context of this, many times this is taken way to simply and out of context, but I am not going to delve into this scripture shallowly.
deuteronomy 13:1-3 "If a prophet, or one who foretells by dreams, appears among you and announces to you a sign or wonder, 2 and if the sign or wonder spoken of takes place, and the prophet says, Let us follow other gods (gods you have not known) and let us worship them, 3 you must not listen to the words of that prophet or dreamer."
deuteronomy 18:21 "You may say to yourselves, How can we know when a message has not been spoken by the Lord? 22 If what a prophet proclaims in the name of the Lord does not take place or come true, that is a message the Lord has not spoken. That prophet has spoken presumptuously, so do not be alarmed."
So from these two passages, notice what it says? If a prophet speaks something and it DOES COME TO PASS, but then he says let's follow other gods, THEN he is a FALSE prophet. Also if what a prophet says, does NOT COME to pass, BUT he is not proclaiming false gods, then he is STILL a false prophet. So, a TRUE prophet, is someone who problaims something, it comes to pass, and he speaks in the name of the true and living God.
The context of deuteronomy 18:9-10 is talking about the natians the isrialites are going to meet in the promised land, those natians worshiped and followed FALSE gods, also they passed their children through the fire, that was the first thing mentioned in deuteronomy 18:9-10. All of there practices they did, revolved around their false gods. Is talking to the dead sorcery all the time? If so then Jesus would have done it in Matthew 17:3, Also if divination is always evil, then Joseph in Genesis 44:15 must have done evil then huh? Also if it's always evil, why would Ezekial say in 13:7 "Have you not seen false visions and uttered lying
divinations when you say, The Lord declares, though I have not spoken?" so he talked about LYING divinations, that implies their is a TRUE, just like there is true visions, as their are false. Also numbers 22:7 says for false divination their is a fee, that ballaam was going to take. Also jude alludes to this as saying "they have rushed for profit into balaams error". Plus the word divination is latin for "to forsee or be inspired by a god" well you can be inspired by false gods or the TRUE God.
So, i'll leave it their for now. My point is, inducing an out of body experience is not evil. Stop looking at this in a shallow way, if you think it's evil, explain logically why it's evil, show how it's evil, present a case against it.