flavorText: "Procedural misstep: provocation of geists for the purpose of yielding more energy can compromise containment units. Next action: clean up mess."\n—Laboratory notes
name: Mercurial Geists
originalText: Flying\nWhenever you cast an instant or sorcery spell, Mercurial Geists gets +3/+0 until end of turn.
printings: EMN, PLST, SIR
text: Flying\nWhenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn.
type: Creature — Spirit