Cradle Clearcutter

The Prototype mechanic exists to sell a card twice, and this Golem is the version where the two halves are the same engine at different scales. The ability adds green equal to the creature's power, so the casting cost you choose is really a decision about throughput: cast for as a 1/3 and you have a mediocre mana dork that taps for one; pay the full for a 3/6 and it taps for three. Any power buff compounds directly into the mana it makes, which is the wrinkle that separates it from a fixed-output dork like Llanowar Elves. The small mode is a fragile early enabler; the large mode is a heavier engine that scales with anything that grows it. Both modes share the same drawback, which the design does not paper over: no haste, so summoning sickness means it produces nothing the turn it lands, and both modes want a follow-up turn to matter. Being an artifact creature cuts against it more than for it, widening the removal that answers it to both artifact and creature hate. What makes the card worth building around is not resilience but the question it poses in the deckbuilding stage: a little ramp now that stays online cheap, or a lot of ramp later that rewards every counter and anthem you can stack on it, with one card willing to be either.