One final note in terms of Corban's lack of a spell list. On his sheet, it straight up says Corban does not memorize spells like most wizards(such as Myron), but instead memorizes their principles.

"Extension - Some mages just memorize the spells that are in the book; Corban memorizes the principles, then mixes and matches them on demand."

Case and point is his clone, which applies practical transmutation and earth magic knowledge, but an illusory principle in that its fooling your characters senses, but not through magical tampering.

Just thought I'd put that out there.