Exponential Growth

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

Sorcery

PSTXStrixhaven: School of Mages Promos#130srare
Foil

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

Border
black
Security stamp
oval
Frame
2015
Pull rate
~1 in 80
Illustrator
Izzy
Found in
Strixhaven School of Mages Prerelease Pack Quandrix · Strixhaven School of Mages Prerelease Pack Prismari · 3 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 8h ago · prices as of 2026-07-12
Foil+0.0%
$0.84
$1.00 low-$0.30 gap
Cheapest playable copy$0.68· 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)