Cheapest priced copy (Strixhaven: School of Mages): $0.39 at Card Kingdom, near mint, their price list as of .
Introduction to Annihilation 
Sorcery — Lesson · Common · Strixhaven: School of Mages · #3
Exile target nonland permanent. Its controller draws a card.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.39 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages | 3 | Common | $0.39 | $0.49 |
2 rulings from Wizards of the Coast
- 16 April 2021Lesson is a spell subtype found on some instant and sorcery cards in the Strixhaven set. The Lesson subtype has no special rules associated with it.
- 16 April 2021Although you may want to include Lessons in your sideboard if you’re playing with cards that instruct you to learn, Lesson cards can be included in your main deck like other instant or sorcery cards.