wotc
If a card in a player's library has {X} in its mana cost, X is considered to be 0.
MTG · Card
◇ Catalog #41
Erratic Mutation
plc·#41·common·foil
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in vault
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for trade
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wishlisted
Feb '07
19 yr ago
Value
$0.27$0 (-34.1%)
30 days high $0.41 · low $0.27
Volatility · high
Tracking since · May 5, 2026
EUR€0.37TIX0.04 tixUSD
Where to buy / sell
Search links · prices vary by venue
Buy this card
Played in EDH
EDHrec rank #28,864 · Fringe play
Variants
Gameplay
Instant
Choose target creature. Reveal cards from the top of your library until you reveal a nonland card. That creature gets +X/-X until end of turn, where X is that card's mana value. Put all cards revealed this way on the bottom of your library in any order.
Legalities
tlrlegal
duellegal
brawlnot legal
pennylegal
PreDH
Rulings · 2
wotc
You reveal cards and the creature gets +X/-X all while Erratic Mutation is resolving. Nothing can happen in between, and no player can take actions.
Notes
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Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Zoltan Boros & Gabor Szikszai
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.