Barl's Cage

A permanent that sells tempo on the installment plan, built before the design vocabulary for soft locks had settled. The cage charges three mana every time you want to keep a creature tapped down, and that recurring cost is the whole point: it turns a permanent into a faucet you pay to keep running, an unusual way to price an effect in an era that mostly traded in one-shot sorceries and static enchantments. The ability targets fresh each activation, so the effect is portable: stop the attacker from untapping after it swings, hold down the creature that just tapped to block, freeze the creature whose tap ability you would rather not see again. Crucially, the activation taps no permanent and costs only mana, so a player floating six or nine can fire it twice or three times in a single turn and detain multiple bodies at once; the ceiling is your mana, not the artifact itself. That open-ended cost is what makes the design read as charging rent per creature rather than a lump sum, and it cuts both ways: against a wide board, paying to hold every relevant threat bleeds you dry, while against the single creature that matters it is a permanent, mana-gated answer that asks no card from your hand once it is down. The later genre of pay-per-turn detainers and lockdown engines all owe something to the shape Barl's Cage sketched first.