Burning Palm Efreet

Anti-flying built directly into a creature body, from the era before reach standardized that job. The repeatable activation is the whole point: for the price of leaving mana untapped, this 2/2 can shoot a flier out of the sky every turn, and the rider that strips flying lets a ground blocker finish the same creature off in combat the same turn. The narrow target restriction, creatures with flying and nothing else, is what justifies a repeatable two-damage ping at all; an unrestricted version that could hit any creature would be a machine gun, so the targeting clamps it to a single threat type. The three-mana activation cost reinforces that ceiling, taxing each shot heavily enough that this never becomes a general-purpose engine. It is a wall built against one thing, and its modest body means it earns its slot purely as that wall, not as a clock. Cards like this trace the ancestry of color-pie answers: red is allowed to deal with fliers, but only through reach-like brawling and only at a rate that charges you for the privilege, never the clean, evergreen anti-flying tools that green receives for the same work.