Exponential Growth
Sorcery
STXStrixhaven: School of Mages#318rare
Extended ArtFoil
- Border
- black
- Security stamp
- oval
- Frame
- 2015
- Pull rate
- ~1 in 80–154
- Illustrator
- Izzy
- Found in
- Strixhaven School of Mages Collector Booster Pack
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
PennyLegal
PioneerLegal
PreDHNot legal
PremodernNot legal
StandardNot legal
Standard BrawlNot legal
TimelessLegal
Tiny LeadersLegal
VintageLegal
Until end of turn, double target creature's power X times.
Plays as: X Spell
Market · per finishspark updated 13h ago · prices as of 2026-07-12
Nonfoil+0.0%
$1.09
$0.80 low$0.45 gap
Foil+0.0%
$2.15
$0.92 low$0.54 gap
Finish
Market
Δ 7D · Trend
Low
Buylist
Buy / Sell Gap
Nonfoil
$1.09as of 2026-07-12
+0.0%
H $1.14L $0.74since Feb 2024$0.80
$0.35
$0.45+56% · normal spread
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Low: tcgplayer
Buylist: cardkingdom
Foil
$2.15as of 2026-07-12
+0.0%
H $4.39L $1.28since Feb 2024$0.92
$0.38
$0.54+59% · normal spread
VenuesHide venues
Low: tcgplayer
Buylist: cardkingdom
Cheapest playable copy$0.51· across 5 printings
Rulings
3 · latest Apr 16, 2021 · one tap opens all
- WotCApr 16, 2021
Exponential Growth doubles a creature’s power sequentially, not all at the same time. For example, if X is 3 and you target a 2/2 creature, you will double its power once to 4, again to 8, and a third time to 16, making it a 16/2 creature until end of turn.
- WotCApr 16, 2021
If a creature’s power is less than 0 when it’s doubled, instead that creature gets -X/-0, where X is how much less than 0 its power is. For example, if an effect has given a 5/5 creature -7/-0 so that it’s a -2/5 creature, doubling its power makes it a -4/5 creature.
- WotCApr 16, 2021
If an effect instructs you to “double” a creature’s power, that creature gets +X/+0, where X is its power as that effect begins to apply. (This is not the value of X you chose when you cast the spell)