Board Thread:Off Topic/@comment-25121612-20130728192937/@comment-6881629-20130728195021

Yeah i always wondered. You have to use a heart skull some bones and flesh to make an effigy and stab it while chanting until the corpse of the Nightmother hears you, it would be a less effort to just kill the person. I guess the parts could come from a grave so you don't have to murder to sumon a assassin or you could just do what Astrid did.

I have also wondered if Aventus used his Mothers remains for the ritual maybe.