Inaccurate?

Dragonmark Battlestrike

( Dragonmarked, p. 138)

[General]

You use the power of your mark to deal devastating blows to other dragonmarked scions.

Prerequisite

Any true dragonmark,

Benefit

As a swift action, you can spend 1 action point to increase the damage of a single melee or ranged attack made against a creature with an abberant dragonmark or with a true dragonmark different than your own. The decision to spend the action point must be made before the attack roll is made. If the attack succeeds, you deal extra damage to the dragonmarked target depending on the strength of your dragonmark.

Dragonmark Extra Damage
Least +1d6
Lesser +2d6
Greater or Siberys +3d6