You may prepare your spells in such a way as to give you greater flexibility.

Prerequisite(s): Prodigy, ability to prepare and cast spells

Benefit: When preparing spells, you may choose two spells of the same level, and memorize them into a single spell slot one level higher. You may then cast either one of these spells, but not both. The spell that is not cast is lost. For example, a 3rd-level wizard with this feat could memorize both magic missile and ray of enfeeblement using one of his 2nd-level spell slots. As soon as he casts one of the two spells from that slot, the other one fades away.