Mercurial Transformation
Sorcery — Lesson
STXStrixhaven: School of Mages#47uncommon
Foil
"For sun's sake, I just want a crab!"
- Border
- black
- Frame
- 2015
- Pull rate
- about 1 per booster–1 in 1176
- Illustrator
- Craig J Spearing
- Found in
- Strixhaven School of Mages MTGO Redemption Foil · Strixhaven School of Mages MTGO Redemption · 7 more
CommanderLegalModernLegalStandardNot legal
Format legality
AlchemyNot legal
BrawlLegal
CommanderLegal
Competitive BrawlLegal
DuelLegal
Future StandardNot legal
GladiatorLegal
HistoricLegal
LegacyLegal
ModernLegal
OathbreakerLegal
Old SchoolNot legal
PauperNot legal
Pauper CommanderNot legal
PennyNot legal
PioneerLegal
PreDHNot legal
PremodernNot legal
StandardNot legal
Standard BrawlNot legal
TimelessLegal
Tiny LeadersLegal
VintageLegal
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.
Market · per finishspark updated 11h ago · prices as of 2026-07-12
Nonfoil+3.8%
$0.27
$0.01 low$0.00 gap
Foil+0.0%
$0.22
$0.04 low-$0.04 gap
Finish
Market
Δ 7D · Trend
Low
Buylist
Buy / Sell Gap
Nonfoil
$0.27as of 2026-07-12
+3.8%
H $0.27L $0.02since Feb 2024$0.01
$0.01
$0.000% · normal spread
VenuesHide venues
Low: tcgplayer
Buylist: cardkingdom
Foil
$0.22as of 2026-07-12
+0.0%
H $0.24L $0.07since Feb 2024$0.04
$0.08
-$0.04-100% · buylist > ask
VenuesHide venues
Low: tcgplayer
Buylist: cardkingdom
Cheapest playable copy$0.22· across 1 printing
Rulings
3 · latest Apr 16, 2021 · one tap opens all
- WotCApr 16, 2021
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.
- WotCApr 16, 2021
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.
- WotCApr 16, 2021
You choose Frog or Octopus as Mercurial Transformation resolves, not when you cast it.