Swiftwing Assailant

White does not usually get to ask an opponent to bleed on a schedule, but that is exactly the wager here: this flyer arrives incomplete, a 3/3 that has to earn its improvement over several turns of pressure before it becomes what it wants to be. The upgrade at the ceiling is modest on paper (+0/+1 and vigilance) but it changes the creature's relationship to the air, because a flyer that can attack without dropping its guard no longer has to choose between racing and walling an opposing evasive threat. Your speed climbs no faster than one step per turn, and only on turns where an opponent has actually taken a hit, so the payoff arrives late by design: the creature rewards a board that has already been pushing damage, not one still hoping to open the account. That sequencing makes it a curve-topper for white aggression that is winning. Its whole value is conditional on the rest of the deck doing its job first, which is honest as design goes: it will not carry a slow draw, and it does not pretend to. Where the beatdown holds, it stops being a slightly-behind body and becomes a sturdy evasive threat that guards the skies while it keeps swinging.