Hobbit Hole is a common Land card from The Hobbit (HOB), collector number 184. Current market price: $0.23 (foil $0.31), TCGplayer market prices via Scryfall.
{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Halflingcycling {4} ({4}, Discard this card: Search your library for a Halfling card, reveal it, put it into your hand, then shuffle.)