Ah, now I remember.
Somewhat unrelated, but I need some advice on my next character. Before I put effort into a new CS only to have Beta, LeeRoy and everyone else in this thread yell at me for making something broken as hell, I have a mind to make a character that primarily deals with acoustics and the electromagnetic force.
I won't get deep into it, but acoustic weapons, when properly calibrated to the resonant frequency of an object (either living or inanimate), basically causes them to shake---violently. Think of them as relatively-primitive matter-disrupting weapons, except minus the usual science fiction mubo-jumbo about power fields and antimatter. Tesla did experiments with this sort of thing actually, where he created some sort of 'reciprocating electricity generator' that he [supposedly] claimed could topple large buildings by causing them to shake. This claim was later debunked by the Myth Busters however, but the overall principle is still fairly accurate in showcasing what sonic weapons could potentially do.
The only issue with sonic weapons is their piss-poor range, however. Possibly one of the most destructive weapons you'll come across, but they'll be outdone in the range department by almost every missile weapon out there. That and they wouldn't function in space, or any other perfect vacuum or near-perfect vacuum environment.
In terms of EM manipulation, I was thinking about having the character use them to augment his own body's durability by strengthening his own molecular bonds, or enhancing his own physical attributes such as speed, strength or agility.
I'm also unsure on how fair it would be if he could just willingly separate electrons and protons from atoms, since this would amount to him having the capacity to basically break down living and nonliving objects to their basic building blocks, so to say. Splitting atomic nuclei is also a real possibility, though this would lead to him generating macro-scale fusion or fission reactions.