Nope. There are a bunch.
Does he blend?
Or (committing suicide) bamf right into Magneto.
Kitty Pryde could just drag Magneto underground and leave him there.
Magik could teleport him to Limbo. (Hm, bad idea; he’d end up taking over…)
Squirrel Girl! That’s the answer! I don’t know how she’d defeat him, but she would defeat him!
The first time Kitty got within reach of Magneto and tried to use her powers, he ruthlessly sent a lethal charge of electricity through her.
Yes, she was intangible at the time. She still went down like the proverbial sack of potatoes.
Oops! Although I’m a long-time reader (i.e., since before Kitty Pryde existed!) I didn’t remember that’n.
Squirrel Girl. She’s our only chance.
Actually, like all great anti-heroes, magneto has a conscience. That is both his greatest strength and weakness. He could be the greatest hero of all time if only he wasn’t sent to a concentration camp. Everything he believes in is virtually identical to any superhero, its just that his methods are too violent.