![Mercurial Geists [Mystery Booster]](http://www.capefearcollectibles.com/cdn/shop/files/203358_eb4be36f-db2d-4eeb-a47a-1ddb1be26ccf_800x.jpg?v=1722790151)
![Mercurial Geists [Mystery Booster]](http://www.capefearcollectibles.com/cdn/shop/files/203358_eb4be36f-db2d-4eeb-a47a-1ddb1be26ccf_1024x.jpg?v=1722790151)
Description
| Set: | Mystery Booster |
| Type: | Creature — Spirit |
| Rarity: | Uncommon |
| Cost: | {2}{U}{R} |
Flying
Whenever you cast an instant or sorcery spell, Mercurial Geists gets +3/+0 until end of turn.
Whenever 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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