Overlord Episode 12 English Dubbed Episode Title:The Bloody Valkyrie.Episode Description:Ainz, while being observed by the other available Floor Guardians from Nazarick, finally goes and confronts Shalltear, who proves to be on par with Ainz. But Ainz beats her with a special move, after which she uses a skill to prevent her death, at the cost of using up all her mana. However, Ainz then states how everything has been going according to his plan.