To be honest, I first learned about the board called "ouija" when I watched the movie Paranormal Activity. There's nothing special about the board. It just says the alphabet A to Z, the numbers 0 to 9, then the words hello and goodbye. Sometimes in other variants it says yes and no.
What makes the sign a bit mysterious are the words hello and goodbye. Isn't it weird, after all, the doormat in front of the house that says welcome is also mediocre.
What is unusual is that the Ouija board is often used for mystical activities such as paranormal activities. As far as I know how it works, there is a small piece of wood like a pointer with a hole in the middle, and several people hold the small piece of wood. Then, one of the holders, will ask random questions directed to something mystical.
And, if the mystical figure is indeed present, the wooden pointer will move to arrange the alphabet to simply convey a message.
If you look at it, the way it works is similar to a local mystical tool called Jailangkung. If the mystical figure enters this object called Jailangkung, he will move the object, which has a pencil at one end, and write a message.
I myself do not believe so, and not interested in trying it. Remembering that Allah has created his creatures with their own nature. And humans are naturally in the world. So why bother with something from other realms. Do you want to prove Marvel's multiverse theory?