I think this is a little bit counterintuitive to many demon/magician synergies, because it almost guarantees that the bottom card won't be evil. It actually hurts Evil Spawn/Armor, Astrologers, Egyptian Magicians, and the like, because unless you intentionally underdeck an evil card you revealed it won't activate. Doing so is risky, because it leaves open the possibility of whatever you use to grab back from the bottom being negated.
I really do like the concept, though.