Many people believe/think that Satan is all powerful over every thing or most things, this is not so. Satan is a drudge to God used as a tool to display before all people on mass or individually on a personal level not just their dark side but their short comings, their deficiencies of spirituality. Therefore he has no credence what so ever in eternity, he is a slave unto himself/herself placed into slavery by God, and there are many spirit in eternity and in the physical just like them, all on their own level of Satanism.
People/spirit in the physical are no stranger to Satanism, fore there are multitudes within their midst, your midst, a fact, if you outstretch your hand before you in a gathering of three or more people you will touch Satan, he or she on many different levels of darkness, no one is exempt, anyone of the three. But at the same time they will experience God also one way or another.
All people have at the same time the ability to be Godly or devilish all on different levels, and it’s their own responsibility to decide which one they want to be, this is so. Free will.