Glimpse the Core is a uncommon Sorcery card from The Lost Caverns of Ixalan (LCI), collector number 186. Current market price: $0.26 (foil $0.33), TCGplayer market prices via Scryfall.
Choose one — • Search your library for a basic Forest card, put that card onto the battlefield tapped, then shuffle. • Return target Cave card from your graveyard to the battlefield tapped.