Erratic Mutation {2}{U}

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.

Illustrated by Zoltan Boros & Gabor Szikszai

Standard
Brawl
Pioneer
Historic
Modern
Pauper
Legacy
Penny
Vintage
Commander
Notes and Rules Information for Erratic Mutation:
  • If a card in a player’s library has {X} in its mana cost, X is considered to be 0. (2021-03-19)
  • 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. (2021-03-19)