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Exponential Growth

{X}{X}{G}{G}

Sorcery

STXStrixhaven: School of Mages#130rare
Foil

Most Quandrix students fundamentally disagree with the concept of "enough."

Border
black
Security stamp
oval
Frame
2015
Pull rate
about 1 per booster–1 in 2340
Illustrator
Izzy
Found in
Strixhaven School of Mages MTGO Redemption Foil · Strixhaven School of Mages MTGO Redemption · 7 more
Printings5
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 14h ago · prices as of 2026-07-12
Nonfoil+0.0%
$0.51
$0.30 low$0.20 gap
Foil-2.9%
$0.68
$0.37 low-$0.08 gap
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)