Mark of Destiny
(Dragonmarked, page 142, DnD 3.5)
[General]
You can call upon the power of your Siberys mark to enhance your combat prowess.
Prerequisite
Any Siberys dragonmark.
Benefit
You can spend 1 action point as a swift action to gain a bonus on attack rolls and weapon damage rolls equal to your heir of Siberys class level for 1 round.