Junk Golem is a rare Artifact Creature — Golem card from Odyssey (ODY), collector number 300. Current market price: $0.23 (foil $3.00), TCGplayer market prices via Scryfall.
This creature enters with three +1/+1 counters on it. At the beginning of your upkeep, sacrifice this creature unless you remove a +1/+1 counter from it. {1}, Discard a card: Put a +1/+1 counter on this creature.