Incidentally, you can find some youtube videos of parts of Witcher I that had some dialogues on the Law - Chaos continuum and how Witchers are tainted by Chaos but ultimately serve the interest of Law by removing Chaos from the world. The devs removed those aspects and changed the model of the subsequent witcher from bone-skinny, thin white duke like, to pretty buff to protect themselves a copyright suit from the author of the Elric series or one the devs he's allowed to use his work. As I understand from the series and reviews, the magic system is still based on an Moorcock alignment model -- casters mold chaos into a lawful form, right?
It has been a while, but I don’t think Michael Moorcock ever really defines how magic works in extensive detail. He is more like Tolkien insofar as magic is just a thing that isn’t really explained and you just accept, rather than going into extensive detail about the workings of magic like Robert Jordan or Brandon Sanderson would.
If Elric was a character in D&D he would be a warlock. His first patron is the Chaos God Arioch and the Hexblade subclass is a pretty direct homage to Stormbringer.
