Fleeting Reflection

Cloning at instant speed is old hat; the wrinkle here is that the copy lands on a creature you already control, not a fresh token, and it stacks two protection layers on top of the transformation. The hexproof shields the target through the copy effect, which matters because the moment a creature becomes a copy of something bigger or more relevant, it draws exactly the removal it was safe from a second earlier. The untap clause pulls its own weight: it hands back a creature you tapped to attack or to activate an ability, so the copy is not just a form change but a reset button. That combination points the card at a specific kind of play pattern rather than raw value. You are not making a spare body; you are redirecting one you already have, mid-combat, into whatever shape the board demands, and once it resolves the opponent cannot answer the transformed creature with targeted removal. The "up to one" phrasing keeps it live even when there is nothing worth copying, letting it function as a bare protect-and-untap trick when the board is thin. It rewards a creature whose activated ability or attack you want to reuse, then borrows a better statline for the swing back.