Tundra Tank

Vehicles almost always live in the color of the deck that fields them, and the crew requirement is the small friction that keeps them fair; this one bends both conventions at once. It is a black artifact with red mana wired into its combat step, an unusual pairing: firebending turns every attack into a burst of with a hard expiration inside combat, so the card only pays off when you have already built around the window it opens rather than banking the mana for later. The crew cost of 1 is nearly free, and the enters trigger hands indestructible to a creature you already control, which means the Tank does three jobs on the way down: it protects a board piece, it fields a 4/4 once crewed, and it feeds an attack step that wants a burn spell or an activated ability primed to catch the transient red. The tension is that firebending mana is aggressively use-it-or-lose-it, so the payoff lives entirely in sequencing: attack first, then cash the into something that resolves before the combat step closes. Strip away the crew clause and this reads like a black creature moonlighting as a mana engine, and that dual-color identity folded into a single artifact frame is the part worth studying.