Coral Colony

Mill as a payoff for a Wall deck is a stranger proposition than it looks, because it fuses two archetypes that usually want nothing to do with each other. Defensive stall decks want to stabilize and grind toward inevitability; mill wants a fast, escalating clock. This 1/4 body sits at the intersection, its toughness buying the time it needs while its activated ability scales with the very blockers keeping it alive. Point it at an opponent and it becomes a slow, self-reinforcing library eraser: every additional defender you deploy widens the count of cards it strips per tap, so the deck's walls double as its win condition. That is the trick, and it is a genuinely elegant one. Build wide on toughness rather than power, and the accumulation itself becomes the reward, no combat step required. The friction is that a single copy does almost nothing alone; the ability reads X where X counts a board state you have not built yet, which makes the card a component of an engine rather than a spell. It also mills any target player, so a stalled table with a full graveyard shell can lean on it as a value spigot rather than purely a finisher. The lineage is old (walls that pivot from defense to offense go back decades), but tying the offense specifically to the count of defenders is the wrinkle that gives this one its own identity.