Holy Frenzy
The anger of your deity takes you, fueling intense rage inside you and granting you the power to smite your enemies with holy fire. This comes at a cost, however, as your body can’t sustain such power for long.
Prerequisites: Divine Grace class feature or ability to cast 2nd-level divine spells, Rage class feature, BAB +4.
Benefit: Once per day while raging, as a swift action you may gain the benefits of the haste spell for a number of rounds equal to ½ your character level. After this effect ends (even if you are unconscious) your rage automatically ends and you are exhausted for a number of rounds equal to your character level. If your rage class feature and divine grace class feature or divine sellcasting ability are granted from the same class (such as the Holy Rager multiclass archetype), you may use this ability one additional time per day.