At 11th level, the magus's ability to recall spells using his arcane pool becomes more efficient. Whenever he recalls a spell with spell recall, he expends a number of points from his arcane pool equal to 1/2 the spell's level (minimum 1). Furthermore, instead of recalling a used spell, as a swift action the magus can prepare a spell of the same level that he has in his spellbook. He does so by expending a number of points from his arcane pool equal to the spell's level (minimum 1). The magus cannot apply metamagic feats to a spell prepared in this way. The magus does not need to reference his spellbook to prepare a spell in this way.
