Hulking Metamorph

Clone effects have always fought a size problem: copy a big creature and you inherit its numbers, copy a mana dork and you inherit those. Prototype breaks that link. Cast for the prototype cost, this enters as a copy of an artifact or creature you control while wearing the 3/3 body it declared on the way in; cast for the full , it copies at 7/7 instead. The clone inherits the copied permanent's abilities and types but sizes itself to whichever mode you paid for, so a fragile utility artifact suddenly comes with a real body, or a menacing beater gets duplicated for four mana at a fraction of its threat. That decoupling of copied text from copied stats is the whole design idea, and it is why prototype and cloning slot together so cleanly: the mechanic lets one card pick its own dimensions as it arrives, and here those dimensions override the copy's rather than surrendering to them. The rider that the copy is always an artifact creature in addition to its other types is not filler either; it hands the clone a second axis of relevance across the artifact-matters space, regardless of what it chose to become. The catch is in the restriction on what you can copy: only an artifact or creature qualifies, so enchantments, planeswalkers, and lands are off the table unless they already carry one of those types. Within that lane, it answers the oldest complaint about the archetype, that a copy is only as good as the best legal thing on the board, by letting you also decide how big that thing should have been.