Boros Aggro is racing with cheap efficient threats like Voice of Victory and Momo, Friendly Flier backed by burn, so cheap unconditional removal is critical to staying ahead on board. Torch the Tower answers their early creatures for one mana, exiling the corpse to deny any death triggers. Giant Cindermaw's 4/3 trample body blocks profitably against most of their early creatures and the 'players can't gain life' clause shuts off the 5 life from Twinmaw Stormbrood, though its main value here is as a sturdy body. Deadly Precision's extra cost is too slow against this aggressive clock, and Callous Inspector's 1/1 body trades poorly into their bigger threats like Nova Hellkite, so trim both for efficiency.