And what's to prevent mages just using this on one another to up skills past normal Teach barriers thus bypassing the importance of Charisma or the Teach skill slot?


Nothing. Beyond needing to use 2 learn spots for void/lunare, and if you aren't a void mage yourself, learn the spell from one ...

Spell name: Mindleech

Difficulty: 50-60 Void/Lunare

Obvious Invocation: YES

Description:

The mind is the domain of the Void, and sufficiently advanced practitioners of void magics are known
to invade the thoughts of others. With this spell, one can not only invade another's mind, but bring ...