Valiancy

Valiancy  5th-level transmutation  [Wizard’s Spell Compendium Vol. 4 (2e)] [Clr Pal Rgr Sor Wiz]

You imbue one creature that you can see within range with martial prowess. For the duration, when the affected creature takes the Attack action to make a weapon attack, it can make one additional weapon attack as part of the same action.