Re: Voodoo Mind Barrier
(Possible spoilers for "Crossroads Blues.")
The character is a voodoo magician with Mind Control and Summoning powers. He operates under the ruse that he's just a stage magician. Ordinarily, the fact that he's a mentalist and magician would make him easier to spot with Mind Scan, or with Detect powers designed to spot such things. The Voodoo Mind Barrier is meant to disguise him from those Mind Scans and Detects, according to the adventure, but the power as written doesn't do a very good job of that.
Shape Shift seems like a better solution: The Voodoo Mind Barrier then disguises him as "me with stage magic instead of real powers." Based on the write-up, he should have a disguise for mental group (mentalists) and detect senses (mystics).