Celestial Armor

The equip cost is a decoy and the flash is the whole point. Pay at sorcery speed and you have an overpriced flying buff bolted to a single creature; flash it in during combat or in response to a targeted removal spell, and the enter trigger goes on the stack the instant the Equipment hits the battlefield, wrapping your creature in hexproof and indestructible until end of turn while the +2/+0 and flying stay stapled on for the rest of the game. That split payoff is what separates this from an ordinary protection trick. A protection spell fires once and evaporates; this defends the creature now and leaves behind a flying threat plus a permanent you can reconfigure onto a fresh body later. The Equipment ambushes a blocker or dodges a kill spell, then moves at sorcery speed once the emergency has passed. The whole calculation lives in timing. Held up during the opponent's attack step, it functions as a two-for-one blowout that justifies the mana. Cast proactively into an uncontested board, it is a slow, telegraphed upgrade to one creature and nothing more. The card wants you sitting on open mana, waiting for the moment protection matters, then collecting the flying body as interest. Putting Flash on an Equipment is the load-bearing choice: without it, this is a buff nobody pays retail for; with it, the buff becomes the consolation prize for a well-timed save.