Eerie Gravestone is a common Artifact card from Marvel's Spider-Man (SPM), collector number 163. Current market price: $0.18 (foil $0.19), TCGplayer market prices via Scryfall.
When this artifact enters, draw a card. {1}{B}, Sacrifice this artifact: Mill four cards. You may put a creature card from among them into your hand. (To mill four cards, put the top four cards of your library into your graveyard.)