Eldritch Mark

(Dragonmarked, page 139, DnD 3.5)

[General]

You channel the power of your dragonmark into your eldritch blast.

Prerequisite

Ability to invoke an eldritch blast, any true or aberrant dragonmark.

Benefit

When you hit a creature with your "eldritch blast":/classes/warlock/ (Complete Arcane 7), you can spend 1 action point to disorient the target, forcing it to succeed on a Fortitude save or become flat-footed. The DC of the save is 10 + your level in either the dragonmark heir prestige class or the heir of Siberys prestige class + your Cha modifier.
Note: A creature with the "Mark of Stars":/feats/dragonmarked--7/mark-of-stars--1861/ feat (page 142) is immune to the effect of Eldritch Mark.