Cheapest priced copy (Jumpstart 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Roots of Wisdom 
Sorcery · Common · Kaldheim · #190
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.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Jumpstart 2022 | 721 | Common | $0.35 | — |
| Kaldheim | 190 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 5 February 2021If there’s a land card or Elf card in your graveyard, you must return one. You can’t choose not to in order to draw a card.
- 5 February 2021Roots of Wisdom doesn’t target any cards in graveyards. You may return a land card or an Elf card that was just milled or one that was already there.