Graverobber Spider is a uncommon Creature — Spider card from Born of the Gods (BNG), collector number 122. Current market price: $0.14 (foil $0.60), TCGplayer market prices via Scryfall.
Reach {3}{B}: This creature gets +X/+X until end of turn, where X is the number of creature cards in your graveyard. Activate only once each turn.