Matopi Golem

A regenerator that bleeds out a little each time it saves itself, which is exactly the kind of self-limiting design the era used to make colorless resilience cost something. Regeneration normally trades a small mana investment for an effectively endless defensive shield: the creature comes back tapped and removed from combat, but it comes back, over and over. This keeps the activation cheap (one generic mana) and then attaches the brake directly to the shield, putting a -1/-1 counter on itself every time it regenerates. The body shrinks toward zero with use. A 3/3 survives the first regeneration as a 2/2 and the second as a 1/1, but the third counter drops its toughness to 0, and the regeneration shield does nothing against a state-based action: the creature simply dies the moment that counter lands. That metered clock is what the design is built around. It converts regeneration from an open-ended resource into a finite one, a creature durable for precisely as many fights as you can afford before it expires under its own accounting. It also creates a quiet tension with anything that wants the body to stay big, since the same ability keeping it alive is the ability whittling it down. A clean, honest piece of mid-90s artifact design: protection metered out in small, irreversible payments rather than handed over wholesale, with the final payment being the creature itself.