Summons a second demon which fights for you for 25 sec and deals 100% increased damage. 1.5 min cooldown. The demon will immmediately use one of its special abilities when summoned:
Grimoire: Imp: Cleanses 1 harmful Magic effect from you.
Grimoire: Voidwalker Taunts its target.
Grimoire: Succubus Seduces its target.
Grimoire: Felhunter Interrupts its target.
Grimoire: Felguard Stuns its target.