Sky Cycle

The enters-trigger scales off Vehicles you control, which sets up a small feedback loop most Vehicle designs never bother with: the more you already have on the battlefield, the harder the next one hits when it lands. Because the Vehicle counts itself, the floor is always 2 damage to a creature (twice the one you just deployed), and every additional Vehicle already in play doubles up from there. Deploy it as the fourth or fifth Vehicle and the damage figure gets genuinely violent. That is a deliberate reward for going wide on a subtype that normally exists in ones and twos, and it changes how the card wants to be sequenced. The gating is that Vehicles cost mana and card slots to assemble, and this one still needs bodies before it can attack, so the payoff sits behind a board you have to build first. A crew requirement of just 2 keeps the activation trivial: a single two-power creature turns it live, or any pair of small ones. Once it is manned, a 4/3 evasive attacker is a real clock, and the entry damage rides along as a bonus keyed to a count that only climbs. The design pays you for having committed to a Vehicle-dense board rather than for jamming one expensive artifact in isolation, which is a rarer thing for the subtype than the plain stat line suggests.