Mind control of large groups. All I would have to do is call someone a racist and everyone in the area would dogpile my enemy while mindlessly chanting how not racist *they* are until my target is defeated and I have collected a critical mass of nike shoes. The side effect is that fellow blacks in the area are not actually controlled, but instead reduced to only gibbering in single syllable sentences and sent into a violent frenzy. As this is nearly indistinguishable from the norm, this effect would thankfully go largely unnoticed. My weakness are child support payments and pools over four feet deep.