Forgotten Lore is a uncommon Sorcery card from Ice Age (ICE), collector number 237. Current market price: $0.28, TCGplayer market prices via Scryfall.
Target opponent chooses a card in your graveyard. You may pay {G}. If you do, repeat this process except that opponent can't choose a card already chosen for Forgotten Lore. Then put the last chosen card into your hand.