Soulsworn Jury

The defining tension of a counterspell stapled to a creature is that the body is vulnerable in two opposite directions: it sits exposed to removal before you can fire the ability, and the moment you do, you spend the permanent to answer a single spell on the stack. The 1/4 defender frame resolves the first half of that problem. A four-toughness wall shrugs off the early creatures it is most likely to be facing and keeps the permission live until a target worth spending it on shows up, while the inability to attack tells you the card was never meant to win races: it blocks now and counters later. The cost structure handles the rest. A white body gates a blue, two-mana activation, so the card only assembles its full function in a deck already playing both colors, and the permission is narrowed to creature spells rather than the broad targeting of a hard counter. That restriction is the price of attaching a counter to a permanent. Because the ability requires sacrificing the Jury, the counter is a one-shot: holding open before it resolves still represents a real threat, and the discipline the card demands is patience, not blocking the first mana dork into range but waiting for the spell that justifies trading the whole creature away. It is an early answer to a perennial two-color question: how to make permission survive a turn cycle and double as a blocker until it is needed.