Swathcutter Giant

The interaction that carries this card is the timing of its trigger. The damage lands when the creature attacks, before blockers are declared, so a wall of small bodies gets thinned or wiped as a precondition of the swing rather than during it. That turns each attack into a one-sided combat reset against go-wide strategies: tokens, mana dorks, anything with a single point of toughness evaporates before it can gum up the red zone. Vigilance is what keeps the loop running, since the giant stays untapped and holds back a blocker while it clears the way, so playing offense never costs it the ability to defend. What pays for the recurring sweep is the shape of the trigger: it only fires on attack, and only for one damage, so it fails to kill anything with two or more toughness. That narrow ceiling is the honest limit on an otherwise repeatable board sweep. The 5/5 frame is incidental to the design; the stats exist mainly to keep the attack trigger firing and the creature standing. Against the swarm it was clearly built to punish, though, it collapses removal spell and threat into a single card, refreshing the effect every combat step it survives.