![Mercurial Geists [Mystery Booster]](https://cdn.shopify.com/s/files/1/0550/0092/4365/files/75b3b292-026b-575f-a678-18e37e63f3c7.jpg?v=1737860594)
Mercurial Geists [Mystery Booster]
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Set: Mystery Booster Type: Creature — Spirit Rarity: Uncommon Cost: {2}{U}{R} FlyingWhenever you cast an instant or sorcery spell, Mercurial Geists gets +3/+0 until end of turn. "Procedural misstep: provocation of geists for the purpose of yielding more energy can compromise containment units. Next action: clean up mess." —Laboratory notes
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