[Pursuivant]

As a precursor to GURPS (yes, really - Steve Jackson's first RPG), I always assumed that TFT used standard GURPS style magic.

Sorcerous magic could work though. The main difference is that spells have an IQ minimum, you get a number of spells at each IQ level, and IQ and other traits in TFT can be far higher than GURPS.

In GURPS terms, ultra-high IQ can be modeled using levels of IQ + Magery, and various sorcery style magic spells/power could require a minimum level of IQ + Magery like standard some GURPS spells.