Cheapest priced copy (Strixhaven: School of Mages): $0.35 at Card Kingdom, near mint, their price list as of .
Overgrown Arch 
Creature — Plant Wall · 0/4 · Uncommon · Strixhaven: School of Mages · #139
Defender
{T}: You gain 1 life.
{2}, Sacrifice this creature: Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages | 139 | Uncommon | $0.35 | $0.49 |
4 rulings from Wizards of the Coast
- 16 April 2021If you bring a card into the game from outside the game in a Sealed Deck or Booster Draft event, you may select only a card that is in the card pool that you built your deck from.
- 16 April 2021If instructed to learn, you may do nothing. Discarding a card and putting a Lesson card into your hand are both optional.
- 16 April 2021If you bring a card into the game from outside the game in a Constructed tournament (or a Constructed game played under tournament conditions), you may select only a card from your sideboard. In casual Constructed games, the card comes from your collection.
- 16 April 2021If a card is brought into the game from outside the game, it will stay in the game until it ends or until its owner leaves the game, whichever comes first.