no to summon the doomguard (after completing qst chain ofc) you need a demonic figurine from a reagent vendor and a 5 man party to do the ritual summon, once the ritual has ended one of the party is sacrificed (always an idea to do the ritual near a graveyard if poss) and the doomguard appears, then you can enslave and create mayhem!!. Always an idea to soulstone yourself prior to summoning as unless you have another lock high enough to enslave and you are the sacrifice it will start beating on your group this one hits far harder than the curse of doom summoned one! so if you have grouped with some lower levels for the ritual i have known it to 1-2 hit the others before making good its escape :).(not to say this isn't highly amusing).