Rise of the Rune Lords
School transmutation; Level Sor/Wiz 4
Casting Time 1 swift action
Duration 1 round
You utter an ancient word tied to the fundamental principles of magic and immediately begin casting another spell.
This spell enhances the next spell you cast, making it more
difficult for targets to resist. The next spell you cast this round is cast round is cast at +2 caster level, and its save DC increases by 1.
Adapted from the Spell Compendium, p. 198