Sand Golem is a uncommon Artifact Creature — Golem card from Mirage (MIR), collector number 318. Current market price: $0.15, TCGplayer market prices via Scryfall.
When a spell or ability an opponent controls causes you to discard this card, return this card from your graveyard to the battlefield with a +1/+1 counter on it at the beginning of the next end step.