Pit Scorpion

The proof of concept for poison, and the design template Wizards spent three decades refining. The mechanic itself was an early curiosity: a parallel win condition tucked onto a 1/1 body at three mana, with a rate nowhere near the threshold needed to actually assemble ten counters before the game ended by normal means. But the structural idea is all here, a creature whose damage to a player ticks a hidden clock, with no way for that player to scrub the counters short of effects that did not yet exist. The trigger reads broadly enough to catch noncombat damage too, the same opening that later infect designs leaned on with pingers and reach. Everything Mirrodin's infect block and the toxic mechanic later did is a refinement of this template, with the key changes being efficiency (one-drops and two-drops instead of a three-mana 1/1), redundancy (a keyword scaling across an entire creature suite), and evasion as a built-in assumption rather than a hopeful prayer. The Scorpion sits in the museum case as the question itself: a designer asking what happens when dealing damage carries a second resource alongside life totals, answering with a creature too small to deliver on the premise, and leaving the design space open for years before anyone returned to it with the math worked out.