Dinotomaton is a common Artifact Creature — Dinosaur Gnome card from The Lost Caverns of Ixalan (LCI), collector number 144. Current market price: $0.13 (foil $0.18), TCGplayer market prices via Scryfall.
Menace (This creature can't be blocked except by two or more creatures.) When this creature enters, target creature you control gains menace until end of turn.