Dark Penance "Backlogged"

Dark Penance - Allows Penance, Smite and Holy Fire to be cast in Shadowform. When you Penance heals your summoned demon, it applies a stack of Dark Penance, increasing the damage your summoned demon deals by 20% per hit for 18 sec. Stacks to 3. While under the effect of Dark Penance, your summoned demon's auto attacks apply Demon Fire. Stacks to 5. Holy Fire consumes Demon Fire to deal 20% additional damage per stack. Your Penance and Smite hits cause your Curse of Agony and Corruption spells to deal their periodic damage. Smite applies Shadow Penance to the target. Shadow Penance increases the damage your periodic shadow spells deal to the target 2%. Stacks to 5.