Expanded Anatomy
Mana cost
Mana value3TypeSorcery — Lesson
Color identity
Colorless
RarityCommon
SetStrixhaven: School of Mages (STX)
ArtistSlawomir Maniak
Price€0.14 · foil €0.17 · $0.26
Expanded Anatomy 
Sorcery — Lesson
Put two +1/+1 counters on target creature. It gains vigilance until end of turn.
"Changing the equation from incremental to exponential was a stroke of genius on my part."
Legality
CommanderLegalStandardNot legalPioneerLegalModernLegalLegacyLegalVintageLegalPauperLegalBrawlLegalOathbreakerLegalHistoricLegalTimelessLegalPenny DreadfulNot legal
Rulings
2021-04-16
Lesson 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.
2021-04-16
Although 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.