Brotherhood Vertibird
A three-mana flyer whose entire threat ceiling is written in your board state: the power that swings damage is your artifact count, so the card is worth precisely as much as the deck built around it. That coupling is the design tension. A creature with variable power scaled to a resource is nothing new, but tying it to artifacts and hanging it off a Vehicle chassis stacks two dependencies on top of each other. It arrives inert, needing a crew of total power 2 to attack at all, and then hits for whatever your artifacts happen to number in that moment. In a light deck it is a Crew-2 speed bump with wings; in a dense artifact shell it is an evasive finisher that also counts itself toward its own power. The fixed 4 toughness is the stabilizing constant here: it survives most incidental removal and combat regardless of how thin the board is, so the card never collapses into a dead draw even when the power is low. What makes it worth reading twice is the feedback loop between Vehicle and artifact-matters: crewing it does not change its power, but every artifact you deploy does, and the flying means that number lands unblocked more often than not. It rewards the exact deck it asks you to build, and offers little to anyone else.
