Evil Twin

A clone that comes packaged with its own kill switch. The Shapeshifter premise is the usual blue one: arrive as a copy of anything on the battlefield and walk away with the best creature in play. The twist is the rider it grants whatever it becomes, a repeatable activated ability that destroys any creature sharing its name. Because it enters as a copy of another creature, that creature always shares its name, and so is anything else carrying the same name. Copy the opposing bomb, then untap and delete the thing you imitated. The constraint lives inside the same mechanic that powers it: the destroy ability keys off names, so the card is sharpest mirroring a singular threat and dullest against a board with nothing worth becoming (a wall of vanilla tokens offers no standout to copy and no name worth killing). The activation is not free either, demanding both colors and a tap each time, which keeps it from doubling as a one-card answer to go-wide decks. It reads as a removal spell that leaves a creature behind, or as a clone that answers the thing it imitated, depending on which side of the table you sit. That copy-then-execute duality resolves the clone's oldest weakness: a normal clone strands you the moment your opponent simply recasts the threat you mirrored, and this one keeps an answer in hand for exactly that recast.