Goblin Kites

A coin-flip enchantment that taxes you for evasion: the flying you grant is real, but the coin you flip costs you. Half the time it eats the creature you just lifted. This is balance-by-randomizer, the dice doing the work that later sets hand to payment costs or sacrifice clauses. The structural logic is that flying on a small body should be cheap to access and dangerous to keep, so the card front-loads the upside (a surprise blocker, a stolen point of evasive damage) and back-loads a fifty-fifty tax that resolves only after the creature has already done its work. The toughness restriction is the other guardrail: it bolts the effect to the fragile end of the curve, the bodies the flip was always going to threaten anyway, so you are rarely risking something the game cared about. The timing window is the interesting part. Because the coin does not come up until the beginning of the following end step, you can pump a blocker during your opponent's attack, bank the evasion, and still keep the creature if the flip cooperates. The damage or the chump is locked in before variance ever enters the equation. It belongs to a design philosophy modern sets have largely abandoned, where the cost of an effect was paid not in mana or life but in a fifty-fifty gamble against your own board.