When activated, sacrifices your summoned Demon to enhance the opposing aspect of your power, granting you an effect that lasts 2 hrs. The effect is canceled if any Demon is summoned. Imp: Increases your Shadow damage by 15%. Voidwalker: Restores 2% of your total Mana every 4 sec. Succubus/Incubus: Increases your Fire damage by 15%. Felhunter: Restores 3% of your total Health every 4 sec.