Roots of Wisdom is a common Sorcery card from Kaldheim (KHM), collector number 190. Current market price: $0.28 (foil $0.11), TCGplayer market prices via Scryfall.
Mill three cards, then return a land card or Elf card from your graveyard to your hand. If you can't, draw a card. (To mill a card, put the top card of your library into your graveyard.)