Masters of the Universe- over the course of many different licenses and writers- usually has a "convenient" magic system (Deus ex Machina and New Powers as the Plot Demands tropes). I always felt the evil mages spammed teleportation, energy bolts, mind control, and sleep- all at will most of the time- but never used it for the kill since good always has to win.

Considering fantasy fiction readers have high expectations for consistent, functional, internally logical magic systems, what would be your ideal magic system for MOTU if you were starting from scratch?