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Spell Improvisation (Su) (3PP)

Spell Improvisation (Su)

The arcanist can expend 2 points from her arcane reservoir as a swift action when casting a prepared spell to instead cast a spell of the same level or lower from her spellbook. She can use this ability a number of times per day equal to 3 + her Charisma modifier. The arcanist must be able to reference her spellbook when using this ability.