Grants both the Warlock and the summoned demon an effect as long as that demon is active. Imp - Increases your Fire damage by 1%, and increases the critical effect chance of your Fire spells by 1%. Voidwalker - Reduces Physical damage taken by 2%. Succubus - Increases your Shadow damage by 1%, and increases the critical effect chance of your Shadow spells by 1%. Felhunter - Reduces all spell damage taken by 2%. Felguard - Increases all damage done by 1%, and reduces all damage taken by 1%.