UR Aggro is a low-curve tempo deck full of cheap creatures like Spider Manifestation and Llanowar Elves that Requiting Hex answers efficiently without the extra cost Deadly Precision demands. Guerrilla Gorilla trades favorably with their small creatures and provides a reach blocker. We cut Fanatical Offering, which is too slow against a fast clock, and Deadly Precision, whose additional cost of paying 4 or sacrificing an artifact or creature is often too slow when you need to stabilize quickly.