gatherer logo
Erratic Mutation

Card Name

Erratic Mutation

Mana Cost

2

Type

Instant

Rarity

Common

rules Text

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 converted mana cost. Put all cards revealed this way on the bottom of your library in any order.

Legal Formats

Commander, Legacy, Modern, Pauper, Vintage

Not Legal Formats

Alchemy, Brawl, Explorer, Historic, Pioneer, Standard

Rulings

(3/19/2021)
If a card in a player's library has
X
 in its mana cost, X is considered to be 0.
(3/19/2021)
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.