Cheapest priced copy (Strixhaven: School of Mages): $0.39 at Card Kingdom, near mint, their price list as of .
Academic Dispute 
Instant · Uncommon · Strixhaven: School of Mages · #91
Target creature blocks this turn if able. You may have it gain reach until end of turn.
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 · $0.39 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages | 91 | Uncommon | $0.39 | $0.99 |
7 rulings from Wizards of the Coast
- 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 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 2021You choose whether you want the creature to gain reach until end of turn as Academic Dispute resolves.
- 16 April 2021The controller of the creature chooses which attacking creature that creature blocks.
- 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.
- 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 2021The creature blocks only if it's able to do so as the declare blockers step begins. If, at that time, the creature is tapped, it's affected by a spell or ability that says it can't block, or no creatures are attacking its controller or a planeswalker controlled by that player, then it doesn't block. If there's a cost associated with having the creature block, the player isn't forced to pay that cost. If that cost isn't paid, the creature won't block.