Aberrant Dragonmark Mystery

(Player's Guide to Eberron, page 49, DnD 3.5)

[General]

You can use the power of your aberrant mark to enhance your magical abilities.

Prerequisite

Concentration 6 ranks, Aberrant Dragonmark

Benefit

When you cast a spell, imbue an infusion, manifest a psionic power (see Expanded Psionics Handbook), or use a warlock invocation (see Complete Arcane), you can sacrifice a daily use of the spell-like ability granted by your aberrant dragonmark as a free action to increase the caster level of the spell, infusion, power, or invocation by +1.