Magic Forums

(Also, I'm sorry if this is on the wrong topic, I'm kinda new here, created the account and was inactive for a while)
I have a few questions. First: Can something besides a demon possess someone? Also, what exactly happens when you're possessed? (Like, does the demon or whatever have complete control over your actions, and you have to sit there and watch, or do they just influence you to do something, or do they just follow you around and attack you instead of controlling you or something else?) Third: If it is possible, how do you possess someone? And finally, how do you prevent yourself from being possessed?