Originally posted by Uriel005
He is a cosmic entity though
There's lots of cosmic entities. some are on the low end (terrax), some are on the high end (Tribunal) and some waffle between the two depending on how much of an idiot the writer is. (Eternity, Galactus).
Hell, there's a scan somewhere of the ancient one (strange's predecessor and former boss) literally wrestling Eternity into submission. No way in hell this should happen, but what can you do.
The way marvel has it though, the top tier in the MU (LT, The infinity gauntlet, cosmic containment units, the celestial TOAA) all appear to have cosmic power sources.
Magic-fueled entities tend to be lower on the scale (Mephisto, Dormammu) and that power tends to come with a boatload of restrictions on what it's able to do thanks to strange and arbitrary rules. (See: Mephisto being supreme in his own realm, and weakening outside of it, Elder Gods like Cthon needing to use host bodies to manifest etc).
so: cosmic > magic at the highest tier, though it's a bit less definitive below that.