The idea of mages as essentially just transforming an energy. The fact that there are raw unstructured skills like shaping that influence your ability to perform structured magic, and can be used to build out new forms (in the same way that fundamentals play into real-life disciplines like music and artisanal work).

The structure of living beings having mind/soul/body and how these are formed to protect against certain kinds of magic (soul-killing for example). The way the major branches of magic essentially map to specific transforms on mana.

It's not axiomatic or anything, but the way magic is structured in the MoL universe feels like it would lend itself nicely to axiomisation in something like a systemic game.