Originally posted by Rage.Of.Olympus
This is tough. MS is extremely durable, and even tougher on the inside, and the strong magic together with the magic weakness vs the MS ability to freeze time, poison fangs and vapour can kill even Superman. He's at a size and weight, that even if the MS was asleep, something like bfr would be hard to do.Superman being so agile, strong and fast, should be able to win but I'm not sure how. A head on collision of mutually assured destruction like Thor did? And even that was the same process that formed the God Blast, Superman doesn't generate that type of power often.
Can Superman win? Sure. Punching the MG and doing lasting damage is almost impossible however, and even then it has a noticeable healing factor. The first time Thor won, it was through mutual destruction of supreme power. The second time, he was about to be eaten and caught the MS' head in a teleportation field.
Rage said it best, period