Greater Metamagic Knowledge

The arcanist can select a metamagic feat as a bonus feat. She must meet the prerequisites of this feat. Each morning, when she prepares her spells, the arcanist can expend 1 point from her arcane reservoir to exchange this bonus feat for another metamagic feat, as long as she meets the prerequisites of the new feat. The arcanist must have the metamagic knowledge exploit to select this exploit.