Hoard Hauler

The reward scales off the defending player's board, not yours: a 5/5 trampler that mints one Treasure per artifact the opponent controls when it connects. That inverted payoff is the wrinkle. Most combat-damage triggers pay out a flat number or scale with your own commitment; this one hands you more resources the more your opponent has leaned into an artifact-heavy plan, punishing exactly the decks built on mana rocks, equipment, or their own Treasure production. Against a clean creature-based board it produces nothing, so the payoff stays contingent on the plan in front of it rather than guaranteed. The Vehicle shell does the balancing work from the other direction. Crewing costs bodies, so it sits inert on defense unless you commit creatures to animate it, and because it has no haste it cannot attack the turn it lands even once crewed; the summoning-sickness clock applies to a Vehicle that becomes a creature the same turn it enters, same as any other. Trample matters most here as the mechanism that forces a sliver of damage through a chump block to turn the trigger on. In the right board state one unblocked hit can snowball a mana advantage large enough to close the following turn, but that ceiling lives entirely inside the opponent's artifact count: they decide, by how they built, how much the Hauler is worth.