Mercurial Transformation 
Sorcery — Lesson
Oracle text (EN)
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.
Printing details
- Set
- STX · 47
- Rarity
- Uncommon
- Language
- EN
- Artist
- Craig J Spearing
- Released
- 2021-04-23
- Prices
- €0.08 · $0.34
Price history
The trend shows with at least 7 days of history.
- Cardmarket, trend
- CardTrader, Near Mint minimum (EN)
The history starts on October 28, 2026 and grows every day.
Show the data
| Date | Cardmarket, trend | CardTrader, Near Mint minimum (EN) |
|---|---|---|
| October 28, 2026 | €0.08 | €0.11 |
Prices
| Source | Non-foil | Foil |
|---|---|---|
| Cardmarket | low €0.02 trend €0.08 30-day avg €0.08 | low €0.03 trend €0.15 30-day avg €0.17 |
| CardTrader (EN) | NM from €0.11 with Zero from €0.11 | NM from €0.14 with Zero from €0.14 |
| CardTrader (any language) | NM from €0.11 | NM from €0.13 |
Cardmarket updated Nov 1, 2026 · CardTrader updated Nov 1, 2026
Buy and look up
Legality
- standard Not legal
- pioneer Legal
- modern Legal
- legacy Legal
- vintage Legal
- commander Legal
- pauper Not legal
- alchemy Not legal
- brawl Legal
- competitivebrawl Legal
- duel Legal
- future Not legal
- gladiator Legal
- historic Legal
- oathbreaker Legal
- oldschool Not legal
- paupercommander Not legal
- penny Not legal
- predh Not legal
- premodern Not legal
- standardbrawl Not legal
- timeless Legal
- tlr Legal
Rulings
-
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.