Thundering Chariot

Crew 1 is the number that tells the whole story. A Vehicle that only needs a single point of power to animate is functionally always online: any lone creature, even a board reduced to one straggler with a point of power to spare, can turn this into a threat. That crew cost is what separates the aggressive Vehicles from the value ones. The heavier a Vehicle's crew requirement, the more it asks you to commit real bodies to the attack; crew 1 asks for almost nothing, so a spare token or a mana creature you were not going to swing with anyway can tap to send it, turn after turn, while leaving your attacking creatures free to attack. The keyword package is built to punish rather than trade: first strike and trample together mean it clears a chump blocker without dying and pushes the overflow through, and haste puts the four mana to work immediately, pressuring the same turn you cast it. What the design wagers is that a resilient, evasive 3/3 the cheapest possible crewer can pilot indefinitely serves an aggressive deck better than a bigger body with a stiffer crew tax. It sits at the low-friction end of the Vehicle spectrum, where the artifact-creature status (dodging sorcery-speed creature removal on the turns you leave it uncrewed) is a minor bonus riding along with a body that mostly just wants to attack.