Mercurial Transformation
STXStrixhaven: School of Mages/#47/2021Uncommon
Colour IDMV 2
Current paper retail
Card Kingdom$0.35
Cardmarket€0.08
ManaPool$0.15
TCGplayer$0.31
MTGO (Cardhoarder)
retail$0.03 tix
Paper retail history (USD)
3 providers
Latest $0.35High $0.35Low $0.35▲ 0.0%
Market and collecting
Market overview
$0.31TCGplayer, USD, retail, nonfoil
Latest observation: 2026-11-10
7d▼ 8.8%30d▼ 6.1%90d▲ 40.9%
90d high
$0.35
90d low
$0.22
Paper printings priced
1
Currently 1st
Cheapest paper printing
$0.29
Strixhaven: School of Mages
- Down 6.1% over the last 30 days on TCGplayer.
- Currently 11% below its 90 day high of $0.35.
- Foil copies of this printing are trading 6% below nonfoil.
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Gameplay and rules
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.
Card capabilities
Sorcery
Derived deterministically from card types, Oracle text and keywords. Not a strategic evaluation.
Format legality
Primary formats
Eternal formats
Rulings (3)
wotc16 Apr 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.
wotc16 Apr 2021
You choose Frog or Octopus as Mercurial Transformation resolves, not when you cast it.
wotc16 Apr 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.
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Ranked by shared capabilities, colour identity, mana value and type. Never by strategic judgement.
About this card
Mercurial Transformation
Mercurial Transformation is a Sorcery — Lesson, with mana cost {1}{U} (mana value 2).
Format legality: Commander: legal, Modern: legal, Standard: not_legal, Pioneer: legal, Legacy: legal, Pauper: not_legal.
Current headline price on TCGplayer: $0.31 (down 6.1% over 30 days).
Frequently asked
Mercurial Transformation FAQ
How much is Mercurial Transformation worth?
The current TCGplayer USD retail price for Mercurial Transformation is $0.31. It is down 6.1% over the last 30 days. Over 90 days it has ranged from $0.22 to $0.35.
What is the cheapest printing of Mercurial Transformation?
The cheapest currently priced paper printing is from Strixhaven: School of Mages at $0.29 on TCGplayer.
What set was Mercurial Transformation first printed in?
The earliest English paper printing that MTGPrices tracks is from STX #47, released 2021-04-23.
Is there a foil version of Mercurial Transformation?
Yes. On this printing, foil copies trade at $0.29 versus $0.31 for nonfoil, which is 6% less expensive on TCGplayer.
Is Mercurial Transformation legal in Commander?
Yes, Mercurial Transformation is currently legal in Commander per Scryfall's legality feed.
Is Mercurial Transformation legal in Modern?
Yes, Mercurial Transformation is currently legal in Modern per Scryfall's legality feed.
Is Mercurial Transformation legal in Standard?
Mercurial Transformation is not currently legal in Standard per Scryfall's legality feed.
What does Mercurial Transformation do?
Mercurial Transformation is a Sorcery — Lesson with mana cost {1}{U}. Its Oracle text reads: "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.".