Shrouded Lore is a uncommon Sorcery card from Planar Chaos (PLC), collector number 91. Current market price: $0.22 (foil $8.45), TCGplayer market prices via Scryfall.
Target opponent chooses a card in your graveyard. You may pay {B}. If you do, repeat this process except that opponent can't choose a card already chosen for Shrouded Lore. Then put the last chosen card into your hand.