OK why not, I didn't sign a NDA, so it's free game......
Holy Power: A weapon of Holy Power is good aligned and blessed with holy power. When it strikes an evil target, this power erupts forth and deals +3d6 points of bonus holy (good) damage to the target, and the target gains one negative level (Fort DC 23 to remove 24 hours later). On a successful critical hit it instead adds +6d6 points of holy (good) damage and inflicts 2 negative levels (or +9d6 and 3 negative levels if crit multiplier is x3, or +12d6 and 4 negative levels if the crit multiplier is x4).
It bestows 3 neg levels on any evil creature attempting to weild it.
It does not stack with Holy special ability.
Caster Level: 23rd; Prerequisites: Craft Magic Arms and Armor, Craft Epic Magic Arms and Armor, holy word; Market Price: +8
There i a little more fluff to ir, but that is the ability.