Greater Divine Surge

Devoted Spirit (Strike)
Level: Crusader 8
Prerequisite: Two Devoted Spirit Maneuvers
Initiation Action: 1 Full-Round Action
Range: Melee Attack
Target: One Creature

A torrent of divine energy courses through you. With supreme force of will, you channel the energy into a devastating attack even as it saps your mortal form.

You make a single attack against an enemy. If this attack his, you deal 6d8 extra damage. For every point of constitution damage voluntarily taken, you gain a +1 bonus to attack and +2d8 damage. You can sacrifice a number of con points equal to your initiator level.
This makes you flat-footed for the rest of the round.