Divine wrath

At 5th level, once per day, the divine champion is capable of channeling the awesome fury of their patron deity, granting them considerable bonuses in combat. They gain damage reduction 5/- and a +3 sacred bonus on attack rolls, weapon damage (damage bonus type is Divine), and saving throws. The divine fury lasts for one round per point of Charisma modifier the divine champion has.
At level 10, the attack, saves, and damage modifier changes to +5. The ability is not capped at level 10 (it gives bonuses past level 30 actually), but the Divine Champion class itself is capped at 10 HD.