You can channel arcane energy into your melee attacks.

<php>echo “<b>Prerequisites:</b>”;</php> 3rd-level arcane spells, BAB +4
<php>echo “<b>Benefit:</b>”;</php> As a swift action, you can activate this feat to channel arcane energy into a melee weapon, unarmed strike, or natural weapons. You must sacrifice one of your arcane spells for the day (of 1st level or higher) to do this, but you gain a bonus on your attack rolls for 1 round equal to the level of the spell sacrificed, as well as extra damage equal to 1d4 per level of the spell sacrificed.