The concept is a mentalist that can create a limited # and\or type of mental illusions so well that people believing them take damage. The limited illusions are a brick type charactor and effects that he might cause, ei the illusion of a broken wall and other environmental effects.
So the character would be a low level mentalist and to the people he could get to believe his illusions a somewhat limited brick.
I hope this is clear enough. What say you Herodom?
Dane