UR Aggro wants to chain cheap cantrips like Sleight of Hand and Opt into growing threats like Slickshot Show-Off and Pompous Battlemage, so cheap unconditional removal that doesn't require extra setup is best. Torch the Tower kills Slickshot Show-Off, Pompous Battlemage, or Elusive Otter for one mana before they grow out of range, and exiling the corpse denies any death-trigger value. Giant Cindermaw's sturdy 4/3 trample body blocks well against their small creatures and races favorably. Deadly Precision's additional cost is too slow against this tempo-based deck, and Callous Inspector's fragile 1/1 body doesn't hold the ground, so trim both in favor of efficient interaction.