my mags at lvl 200, now what?

[Banshee]

No, it only changes back if you feed it with that character.

There are 2 (sorta) ways to change how a mag looks. I don't think it can change at level 200, and even if it did it would change back to the original when you put it back. Anyways.. If it JUST evolved, and you didn't feed it, you can move it to another char and when you feed it once (even if it doesn't level up) it will change to whatever mag that char would get. But once you move it back it will be the way it was before.. I do this a lot to get certain PB. And, the second way is just to feed it on another character, it will change after a few levels if not one.