Vertigo

Red has always struggled to touch the air, and this is one of the early designs that handed it a way in without granting a general-purpose burn spell. The targeting clause is the whole balancing mechanism: only a creature with flying is a legal target, so against a ground board the card sits dead in hand. That narrowness is what buys the cheap rate, the same trade every conditional answer makes when it pays in restriction instead of mana. Two damage clears most of the small evasive threats that defined combat at the time, and for the larger fliers that survive, stripping flying until end of turn is the more telling piece of design. That rider turns a removal spell into a combat tool: it can knock an attacker out of the sky so a grounded body trades with it, or pull an evasive blocker down so it cannot intercept the swing back. The damage handles the cheap fliers; the flying-loss clause handles everything the damage cannot kill. It is a narrow card built for a specific structural problem, and the way it answers two different threats in a single instant is what gives it more reach than its limited target pool suggests.