Suffering Knowledge (Su)

Exploit Level: Greater (this is a greater arcanist exploit.)

Benefit(s): When you fail a saving throw against a spell cast by an enemy, as an immediate action you can expend 1 point from your arcane reservoir to temporarily acquire the spell. You can cast the spell using your spell slots as if it was a spell you had prepared that day. The spell must be on the sorcerer/wizard spell list and must be of a level that you can cast. The ability to cast this spell remains for a number of rounds equal to your Charisma modifier (minimum 1).