Capenna Express
Green does not get to slap a 6/6 onto a permanent creature for four mana, but the Vehicle template quietly rents it that power: an inert hunk of machinery only becomes a creature once something animates it, and the color pie waves that body through where it would object to the same stats worn openly. Crew 3 is the familiar toll, cheap enough once a couple of bodies are down, but the sacrifice line asks for a second look. Feeding it a Treasure animates the truck without tapping anyone, so it can swing the same turn a token arrives, and it can turn itself live even when your whole board is tapped out or dead. That folds a historically color-agnostic artifact concept into the green-Treasure sacrifice shell, converting a resource you were hoarding for ramp or fixing into an ignition switch instead. A Vehicle normally stalls when there is no one left to pilot it; this one keeps a spendable crew member in reserve, so a board that has emptied still fields an attacker. Everything appealing about the card runs through that first ability: banking Treasure and cashing it for a swing on demand, no permission required from anything else in play.

