What would happen if the Custom Level "Crags" was hoisted a few hundred feet or so in the air by some unknown force (potentially wizards?)

You'd probably end up with something like Sky Crags, assuming most of the ground was shifted around during the launch skyward. Levitation isn't an exact magic, after all.

What happened to the rest of the mountain "Crags" was centered around? Who's to say, though granite and slate doesn't typically take too kindly to being jettisoned into the air, so perhaps it's the backdrop to another stage entirely now.

Map by KrackoCloud

Music used:
White Tail Woods 4-1 - Tomzie95
(http://darkerastudios.weebly.com/rcs-original-soundtrack.html)