Demonology Tome: Demonic Empowerment

"Grants the Warlock's summoned demon Empowerment. Imp - Increases the Imp's spell critical strike chance by for - Increases the Voidwalker's health by %, and its threat generated from spells and attacks by for - Instantly vanishes, causing the Succubus to go into an improved Invisibility state. The vanish effect removes all stuns, snares and movement impairing effects from the Succubus. Felhunter - Dispels all magical effects from the Felhunter. Felguard - Increases the Felguard's attack speed by and breaks all stun, snare and movement impairing effects and makes your Felguard immune to them for 08d."