Copycrook
The clone has always been a snapshot bet: you copy the best body on the board when your Shapeshifter enters and live with that state while the game keeps moving. A copied 4/4 stays a 4/4; the trouble with the archetype is that it captures a position, not a trajectory. This design rewrites that math by grafting an engine onto the copy. The body keeps every ability of whatever it imitated, and gains one more on top: an attack trigger that connives. So the borrowed creature grows each time it swings and filters your hand toward the next threat, turning the clone from a reactive mirror answer into a proactive threat that can outscale the thing it copied. The tension lives in what you point it at. Copy an aggressive attacker and the connive compounds naturally, each swing feeding a card and, when you pitch a nonland, a +1/+1 counter. Copy a defensive wall and you still get the connive on attack, but the borrowed body may not want to be swinging in the first place. That conditional counter is the discipline on the growth: filtering alone never pumps the creature, only shipping a spell you no longer need does, so the engine rewards you for digging past dead lands rather than for spinning the wheel. It is the clone reimagined as a self-improving threat, borrowing a form and then improving on it.
