Ballista Charger is a uncommon Artifact — Vehicle card from Kaladesh (KLD), collector number 196. Current market price: $0.06 (foil $0.39), TCGplayer market prices via Scryfall.
Whenever this Vehicle attacks, it deals 1 damage to any target. Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)