Silent Gravestone is a rare Artifact card from Rivals of Ixalan Promos (PRIX), collector number 182p. Current market price: $1.22 (foil $1.48), TCGplayer market prices via Scryfall.
Cards in graveyards can't be the targets of spells or abilities. {4}, {T}: Exile this artifact and all cards from all graveyards. Draw a card.