Autochthon Wurm is a rare Creature — Wurm card from Ravnica: City of Guilds (RAV), collector number 191. Current market price: $3.57 (foil $11.07), TCGplayer market prices via Scryfall.
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Trample