Considering we are addressing a "claim" of existence, a conclusion would be the closest fit while a belief is completely out of the question. A claim is put forth, that magical super Beings exist, and you either find reasons to "believe" this claim or you don't. We are not theists (the ones with a belief), we cannot share their belief due to no "good" reasons to do so. This does not have to be a conclusion, you can still be open to accepting any new evidence or reasoning that can cause you to share that belief. There have been atheists who have become theists. Of course the problem lies with what people consider to be "good" reasoning. The more you know, the less likely you are to ever find "good" reasoning to support the existence of these magical Beings and actually evidence and reasoning that cause you to absolutely rule them out as impossible. This would be gnostic atheism, which is an actual conclusion.