Duplicant

Removal that walks away with a body. The trick of the imprint clause is that it bundles two effects colorless decks rarely buy cheaply (a hard answer and a finisher) into one card, and it does the removing by exile rather than destruction: indestructible is irrelevant, regeneration and recursion shells go cold, and there's no death trigger to feed. What six generic mana buys is an answer that becomes the threat it just answered, since the Shapeshifter copies the power, toughness, and creature types of whatever it ate. Exile a dragon and you swing back with that statline grafted onto the 2/4 frame; exile a 1/1 and you've spent six mana to trade down, which is the honest price of the flexibility. The board state sets the ceiling: against an empty one this stalls as a 2/4 whose entrance trigger found nothing to remove. The copied stats also hang on the exiled card staying put, so anything that returns the exiled creature (a commander leaving for the command zone, an effect that fishes cards out of exile) reverts this to its base 2/4. The constraint that draws its reach hides in one word: imprint targets, so an opposing hexproof creature can't be exiled at all. As a hard answer available to any color identity, it earns its keep doing a job almost nothing else does on a single colorless card.