Talfirian Song

(Races of Faerun, page 170, DnD 3.0)

[General]

You can use the power of your bardic music to enhance your Illusion spells.

Prerequisite

Heighten Spell, Bardic music class feature, Tethyrian human

Benefit

By expending uses of your bardic music, you can heighten your illusion spells without using higher-level spell slots. For every daily use of your bardic music you expend during the casting of a spell, you can increase the effective level of that spell by +1. For example, you could cast rainbow pattern and expend four uses of your bardic music to make that rainbow pattern effectively an 8th-level spell (increasing the save DC by +4). You can't raise a spell above 9th level with this feat.