Mmmm, valid point. Thinking about it on those terms, it's pretty similar to the spell Phantasmal Force. So a change to: save on activation and then a skill check to get rid of; probably make it a Wisdom save since it's still pretty strong and collectively, monsters have much higher Wisdom than Intelligence.
Barbarian Primal Path: Path of the Bureaucrat
I updated it. Thanks nickl_2000, I always look forward to your input, and had had a bit of homebrewer's block on how to fix it.