Carapace Forger

The bargain here is a green two-drop that reads as a vanilla bear until your board hits the third artifact, at which point it stands up as a 4/4 with no further investment. Metalcraft was a clean way to reward an artifact-dense deck without taxing the card itself: the +2/+2 is a static condition checked continuously, so the body swells the moment you control three artifacts and snaps back to 2/2 the moment you do not. That continuous check is the whole shape of the design. There is no tap, no sacrifice, no life payment, and no upkeep trigger to remember; the cost is paid entirely in deckbuilding, and the payoff scales to the commitment rather than asking for an extra resource to flip a switch. A 4/4 at two is well above curve, but you only collect it in a shell built to keep the count high, and the Elf Artificer typing points at exactly the green-aggro-meets-artifacts space the card wants. The vulnerability is the same board state that powers it: blow up an artifact, or trade off two of them in combat, and the threat shrinks mid-game without the opponent ever touching the creature. It is one of the more honest takes on conditional power that early artifact-matters design produced, sizing the reward to the condition and letting the condition stay live on both sides of the table.