Devils and Realist Vol. 8 - Madoka Takadono - Bog

William's logical worldview is about to take a hit, when he comes across a mystical seal which he unintentionally uses to summon a demon. The demon's name is Dantalion, a Grand Duke of Hell, who informs the young nobleman of his destiny-that he is the new "Elector" whose sole responsibility is to appoint the next ruler of Hell in place of Lucifer.