misc magic system + gimmick compilation (+ maybe scenarios?)

Need inspiration for a magic system for a D&D campain/fanfiction/video game/whatever you're doing? Here I'm cataloguing some of my own creations, albeit inspired by other fanfictions (as in grabbing multiple magic systems, mashing them together, and tweaking some stuff to make it fit better). Enjoy and feel free to borrow, ideas are a dime a dozen after all.