It's your Wisdom score. The minimum Wisdom to cast an Inquisitor spell is 10+Spell Level, so a 10 Wisdom Inquisitor can only cast 0-level spells.
Currently Running: Pathfinder Second Edition
Currently Playing: Pathfinder First Edition, Star Trek Adventures
Former HL Games: D&D 4e & 5e, Mutants & Masterminds 2E & 3E, Savage Worlds
|