Windscouter
A flier you rent rather than own: every time it commits to combat, attacking or blocking, it goes back to your hand once the dust settles. The body itself is the standard rate, for a 3/3 flier, the same line Phantom Monster occupied; the self-return is what the design layered on top, a clause that reads like a penalty and earns a real one in tempo. Each swing means another four mana to redeploy, so you either bank value from the re-entry or accept the recast as the upkeep cost of keeping the flier alive. The recursion is also the hook. Anything that profits from creatures re-entering the battlefield (comes-into-play triggers, an evasive body that spends most of its existence safe in hand and out of reach of sorcery-speed removal) finds an eager accomplice. The flying is what makes the bounce worth swallowing: a ground creature with the same text would just blink itself out of every block, but a flier can connect, leave, and return to connect again, turning the return clause from pure liability into a controlled redeployment loop. It is a small, honest specimen of an early-era instinct: make a creature's presence contingent on what you keep willing to spend, and let the player decide whether the flier is a fixture or a recurring expense.
