First printed in Strixhaven: School of Mages (2021)
Sorcery — Lesson
Until end of turn, target nonland permanent loses all abilities and becomes your choice of a blue Frog creature with base power and toughness 1/1 or a blue Octopus creature with base power and toughness 4/4.
"For sun's sake, I just want a crab!"
- Illustrated by
- Craig J Spearing
Legality
- Legal in
- Pioneer, Modern, Legacy, Vintage, Historic, Timeless, Gladiator, Commander, Duel Commander, Tiny Leaders, Oathbreaker, Brawl, Competitive Brawl
- Not legal in
- Standard, Pauper, Future Standard, Alchemy, Penny Dreadful, Premodern, Old School 93/94, Pauper Commander, PreDH, Standard Brawl
Rulings (3)
- 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.
- 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.
- You choose Frog or Octopus as Mercurial Transformation resolves, not when you cast it.
Prices
MTGO price: 0.003 TIX, the cheapest non-foil print (average sell price on GoatBots, 1 Nov 2026).
