Phoenix Fleet Airship

The engine is the sacrifice trigger, and the win condition is buried in the second ability: a permanent named Phoenix Fleet Airship that becomes a live creature the moment you assemble eight of them. That is a token-copy payoff whose condition is simply controlling enough permanents named after the card that makes them. Each end step, if you sacrificed a permanent, you get a copy; the copy is itself a Phoenix Fleet Airship, so it counts toward the eight, and it can feed the next sacrifice. What starts as a slow value trickle compounds into a fleet, and at eight copies the whole stack quietly flips from inert Vehicles into a squadron of flying 4/4 artifact creatures that never need crewing again. Crew 1 matters early, when you have one or two and need bodies to push through, but it fades into irrelevance once the creature clause switches on. The build discipline is finding a sacrifice outlet cheap enough to fire every single turn, because a missed end step is a lost copy and the count stalls. Multiply too slowly and the threshold never arrives; race there and you have manufactured a board of evasive threats out of a repeatable sacrifice loop. The design folds its own reward back into its resource: the card's payoff is measured in how many of the card you can print, and every sacrifice you make is a step toward not needing them anymore.