Unstable Mutation
Mana cost
Mana value1TypeEnchantment — Aura
Color identity
Blue
RarityUncommon
SetUltimate Masters (UMA)
ArtistSlawomir Maniak
Price€0.13 · foil €0.28 · $0.07
Unstable Mutation 
Enchantment — Aura
Enchant creature
Enchanted creature gets +3/+3.
At the beginning of the upkeep of enchanted creature's controller, put a -1/-1 counter on that creature.
Enchanted creature gets +3/+3.
At the beginning of the upkeep of enchanted creature's controller, put a -1/-1 counter on that creature.
Legality
CommanderLegalStandardNot legalPioneerNot legalModernLegalLegacyLegalVintageLegalPauperLegalBrawlNot legalOathbreakerLegalHistoricNot legalTimelessNot legalPenny DreadfulNot legal
Rulings
2005-08-01
The -1/-1 counters stay even if the Aura is removed, and the +3/+3 goes away when the Aura does.
Printings (9)

Ultimate MastersUMA #80 · Uncommon · €0.13

Time Spiral TimeshiftedTSB #33 · Special · €0.29

Fifth Edition5ED #131 · Common · €0.27

Fourth Edition Foreign Black Border4BB #110 · Common · €0.34

Fourth Edition4ED #110 · Common · €0.10

Summer Magic / EdgarSUM #86 · Common · €275.00

Foreign Black BorderFBB #86 · Common · €0.20

Revised Edition3ED #86 · Common · €0.28

Arabian NightsARN #22 · Common · €6.42