Type: General
Source: Complete Mage
You can expend some of your musical abilities to increase the potency of your enchantment or illusion spells.
Prerequisite: Bardic music, ability to cast arcane spells.
Benefit: As a swift action before casting a spell, you can attempt a Perform check (DC 15 + the level of the spell you intend to cast). If you succeed, you can sacrifice one of your daily uses of bardic music to increase the save DC of the next enchantment or illusion spell you cast in the same round by 2. If the Perform check fails, you still lose one daily use of bardic music but gain no benefit.
You can apply Captivating Melody only to spells cast by the same class that grants you your bardic music ability. For instance, if you are a multiclass bard/wizard, you can apply this feat to bard spells, but not to spells you cast as a wizard.