Boommobile is a rare Artifact — Vehicle card from Aetherdrift (DFT), collector number 310. Current market price: $0.27 (foil $0.34), TCGplayer market prices via Scryfall.
When this Vehicle enters, add four mana of any one color. Spend this mana only to activate abilities. Exhaust — {X}{2}{R}: This Vehicle deals X damage to any target. Put a +1/+1 counter on this Vehicle. (Activate each exhaust ability only once.) Crew 2