Oh, what? Thor actually frowns in contemplation at that, thoughts grinding against one another and he tries to sort that out. The Odinforce is - was - powerful magic, and no mere parlor trick could overcome it. But unalterable? He's seen more than enough to put cracks in the foundation of the Allfather before him. It'd be stupid to assume that no magic could undo what Odin cast. Right?

Has anyone actually tried magic on Mjolnir since the enchantment?

"You could try," he says slowly, rubbing at his chin and almost tangling his fingers in his beard braids. "That... might work. If th' spell's strong enough. Or... can... undo things?" Though something about that doesn't sound right either. He's a little too drunk to contemplate the logistics of time loops and the fact that the ancient hammer was unchanged the day he'd taken it.