Shape Stealer

A defensive chameleon whose whole game is mirroring whatever it touches in combat. The body it shows up with is irrelevant: the moment it blocks or becomes blocked, it borrows the other creature's power and toughness wholesale, which converts the most fragile possible frame into a clean one-for-one in the red zone. A lone attacker that would normally crash through a flimsy blocker suddenly meets its own dimensions, and barring first strike or some other combat-warping keyword, both die. That is the design tension this Shapeshifter resolves: a universal even trade against almost anything, with no mana investment beyond casting it. The catch is timing and intent. The copy only happens through combat, and only until end of turn, so it does nothing against burn, nothing against an alpha strike it can only block once per combat, and nothing while attacking unless a defender steps in front of it. Because it matches toughness as well as power, the exchange is symmetrical: it kills what it touches and dies to it, so survival is the exception, not the plan. This is a puzzle piece more than a workhorse, an answer that sits inert until a board arrives where becoming the largest creature across the table is precisely what the moment demands. Its low cost means the wait never costs you a dead draw while that board takes shape.