Ghost Ark

Most Vehicles crew for an attack; this one crews for a graveyard. The Repair Barge trigger keys off the crewing itself, not combat or an attack step, which makes the flying 3/3 almost incidental: tap two power, and every artifact creature card in your graveyard gains unearth until end of turn. That reframes the card as a reanimation button wearing a beater's costume, and it rewards a very particular board: a graveyard stocked with artifact creatures, enough mana to buy back several of them before the turn ends, and enough attackers that crewing was free anyway. Because the ability grants unearth until end of turn, one crew arms the whole graveyard at once; there is no need to crew again to re-open the window. Unearth returns each creature until end of turn and then exiles it, so the payoff is a burst of enters-the-battlefield triggers and a single alpha swing rather than a lasting army. That exile clause also draws the boundary of the plan: an unearthed creature that would leave the battlefield is exiled instead, so sacrifice outlets and death payoffs get nothing back from these bodies. The design's cleanest trick is that the crew cost and the recursion trigger are the same action: the tap that turns the barge into a creature is the same tap that opens your graveyard, and the -per-creature tax is what stops the whole thing from tipping over.