The Lunar Whale

Card advantage keyed to combat is an old design lever, but attaching it to a Vehicle changes the math. Future Sight granted permanent top-of-library access at the cost of a full permanent slot; here the look is free and always on, while the play permission switches on for any turn the ship has attacked. Note the timing carefully: the ability is not a damage trigger and does not care whether the attack connects. It reads "attacked this turn," so once combat is declared, you have the permission for the rest of your turn regardless of how blocks resolve. The window opens after the attack, not before, which makes sequencing the point of the card: swing first, then spend off the top with the second main phase and everything after. Crew 1 is what makes that cheap to reach: a 3/5 flier that almost any creature can animate, so the attack requirement costs almost nothing and the body is large enough to keep swinging into most ground defenses. The Vehicle framing also matters for survivability, since it is only a creature while crewed and reverts to an artifact between turns, dodging the sorcery-speed creature removal that would otherwise strip a repeatable engine. Very little input (one attacker, one point of crew, a lane for an evasive 3/5) buys an extra card every turn the ship goes in, the kind of low-friction advantage that flying was built to protect.