Savage Mansion is a common Land card from Marvel's Spider-Man (SPM), collector number 183. Current market price: $0.17 (foil $0.21), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {R} or {G}. {4}, {T}: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)