Giant Oyster

A creeping-death engine built around the cost of immobility. The design idea is that this creature buys its lockdown by staying tapped: you commit it indefinitely, and in exchange the target you grip stays gripped, accumulating a -1/-1 counter every draw step until it withers off the table entirely. That coupling is the whole card. The threat doesn't untap, but neither does the Oyster, so each activation is a sustained investment rather than a repeatable tap-down; this is a relationship between two tapped permanents, not a one-shot removal trick. The reversibility clause is the elegant part and the trap at once: untap the Oyster (or let it die) and every counter you've stacked evaporates, the target snapping back to full health. So the engine wants you to leave it locked, never blink it, never let it free up for blocking, and simply wait for the math to finish the kill. It is slow disruption priced in a 0/3 body that deals no combat damage and can barely defend while it works, which is exactly the kind of fiddly, conditional, patience-demanding effect its set traffics in. The clock is real but glacial, and the moment you need the creature back for anything else, you forfeit the progress. A genuinely odd piece of design: removal that is also a leash, where letting go undoes everything.