Star vs. the Forces of Evil - Remember. Star killed Wander and destroyed Gravity Falls.

She didn't destroy the magic from every multiverse, we even saw a Glossaryck from another dimension:

Is it so hard to think that, just like they are infinite universes, infinite princesses, and infinite Morties, there are also infinite realms of magic?

That's what I was thinking: Tapping into different magical sources. I don't think Wander is a magic being, but more like a goofy redneck lollipop alien.