Thrór's Map is a uncommon Legendary Artifact card from The Hobbit (HOB), collector number 179. Current market price: $0.24 (foil $0.29), TCGplayer market prices via Scryfall.
When Thrór's Map enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle. {2}, {T}: Draw a card, then discard a card.