Cytoshape

Most clone effects make you the copy, fixing the result on the caster's own board: Clone enters as something, Vesuvan Doppelganger transforms into a creature you control. The instruction here points the other way. You pick the creature to copy, and you aim the change at a target you do not have to own, which makes this a redirection tool dressed as a copy spell. The obvious line is upgrading your own attacker into the biggest body on the board at instant speed, but the deeper one is sabotage: turn an opponent's threat into a copy of something smaller, or copy a token into a shape it never meant to be, then let the turn snap it back. The nonlegendary clause is the price of admission; it walls off the cheapest abuse (turning everything into a copy of a powerhouse legend) and keeps the trick honest as combat and board interaction rather than a value engine. Because the new identity expires when the turn does, the spell rewards casting it inside a specific window, a declared attack, a triggered ability waiting to resolve, a creature about to die, instead of treating it as a permanent stat fix. It is a blue-green answer to a green-white problem: instead of out-sizing a creature, you out-define it for one turn and let the timing do the rest.