Titre original : The Sword of Ama no Murakumo
In the Netherworld Godou meets the god behind the current situation and finds out several interesting things. Meanwhile, Erica is struggling to endure the Netherworld's enviroment while fighting for her life. Ena of the Seishuuin family loses control of her Possession ability causing her sword, Ama no Murakumo, to fully possess and control her. Godou interrupts, but the Netherworld is still killing Erica. Her only chance may lie in the last Authority Godou has yet to master, that of the Youth. Back home, Shizuka is planning dire things for Godou after listening (and misunderstanding) things Athena said about her relationship with Godou. Liliana and Yuri are interrupted in their rescue plans by the same scythe wielding snake goddess that consumed Perseus.