As he carries out his plan to strengthen Nazarick using the peculiarities of the parallel world, Ainz sends his loyal NPCs to hunt for humans with combat skills, a unique phenomenon of this world that did not exist in Yggdrasil. But something goes wrong. An ancient, mysterious, and powerful legacy of this world rises against his strongest servants. Could it be that for the first time since arriving in the parallel world, the invincible Ainz is about to face a real fight to the death against a worthy opponent?