You can prepare arcane spells ahead of time using unprepared spell slots.
Prerequisite: You must be able to cast arcane spells.
Benefit: You may prepare an arcane spell using an unprepared spell slot. A prepared spell that is modified with metamagic can be cast as a standard action instead of as a full-round action.
Normal: A sorcerer cannot prepare a spell with the two unprepared spell slots for each spell level, and a bard cannot prepare any spells.