Agony Warp

The trick here is that the two effects target separately, and that split is the entire design. Most efficient creature removal in two mana commits its whole effect to one creature: this hands you two independent paragraphs of stat reduction, which you can stack on a single creature to kill it (-3/-3 is dead for anything that size or smaller) or spread across two attackers to shrink a board you cannot fully answer. The -0/-3 half is real removal; the -3/-0 half is pure tempo, blanking an attacker's damage without touching its toughness, which matters against indestructible creatures and against anything you would rather bounce out of combat math than actually destroy. That second mode is the reason the card reads as more flexible than a clean kill spell: it does not always kill, but it never has a dead target, because shaving three power off the biggest thing in play is always doing something. The cost of that flexibility is the toughness ceiling: against a four-toughness body the -0/-3 line is just a chump-block enabler and the -3/-0 line is just a one-turn detour, so the card rewards a deck that picks its window rather than one that points it at anything. It belongs to the same instant-speed, two-color removal tradition that prices answers below the threats they trade with, and the dual-target wording is what keeps it from aging out as creatures grew larger.