Knight of Dawn

A repeatable protection engine built onto a body, which is the design move that separates it from one-shot answers like Story Circle or the pump-and-protect tricks of its era. The first strike never changes and the toughness never moves, but the second ability lets a single 2/2 redefine what it is immune to on demand, paying each time. That repeatability is the payload: protection from a color does fourfold work (it cannot be blocked by that color, takes no damage from it, sheds enchantments and equipment of it, and dodges its targeted removal and burn), and because the activation happens at instant speed, the knight answers a spell already on the stack rather than committing to a guess. The cost discipline keeps it honest; each activation taxes your mana, so reacting to a second threat is real resource spend, not a free toggle. The body stays deliberately small because the ability is doing the work: a creature that can choose what it is immune to does not also need to be a clock. The interesting line is offensive, naming the blocker's color to push damage through, but the constraint is that pushing damage means attacking, and without vigilance the knight is tapped afterward. So the choice is binary on any given turn: spend the activation to make an attacker one color can't stop, or hold it back and let the same mana convert your one blocker into a wall against threats of that color.