Guild Thief

A snowball wearing a body. The 1/1 is the wager: it starts too small to matter and grows only by connecting, so every counter it earns is proof it already got through once. The Cunning Action activation is what closes that loop. Four mana to make it unblockable turns the counter clause from a hope into a plan, because an unblocked attacker deals combat damage by default, and combat damage triggers the growth. Land one hit and the ability pays for itself: each swing feeds the next, the evasion guarantees the trigger, and the trigger makes the next threat harder to trade with. The tension runs the other way, though: the trigger wants a tiny, dispensable creature nobody bothers to remove, while the activation wants that same creature to survive long enough to justify sinking mana into it turn after turn. That gap is the whole game with the card. It rewards patience with mana while punishing the impatience that would rather just cast something bigger. Nothing about the rate screams, and that is the point: a low-floor, high-ceiling threat that trades immediate impact for a compounding curve, the kind of attacker that only looks good after it has already been ignored for a turn or two.