Earthrumbler is a uncommon Artifact — Vehicle card from Aetherdrift (DFT), collector number 315. Current market price: $0.30 (foil $0.28), TCGplayer market prices via Scryfall.
Vigilance, trample Exile an artifact or creature card from your graveyard: This Vehicle becomes an artifact creature until end of turn. 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.)