How do you design a minor talent with some supernatural power OTHER than those listed directly on the power sheet. e.g., Stephen King novels often feature 1-trick ponies - psychokinesis, telekinesis, etc. Those aren't listed anywhere. They're essentially, I think, like evocations - but it's the only thing they can do, there's no focus, they can charge up/bleed off power and take backlash. It's not "focused practitioner," because it's just evocation with that one ability.
Thanks in advance for your assistance.