1x13 - The Betrayal Knows My Name

Yuki is stunned at the appearance of his childhood friend, Kanata, as Reiga. While Yuki struggles to deny the fact that Reiga is trying to kill him, the others try to protect Yuki from harm. Shusei and Hotsuma defend against the Opast twins who recovered from their injuries due to Reiga's power. Meanwhile, Luka is distracted by Fenrir, the familiar beast of Reiga. Luka, Shusei, and Hotsuma all manage to defeat their respective foes and rush to Yuki's side as Reiga aims icicle daggers to kill him. Takashiro appears just in time to shield Yuki. Takashiro and Reiga both use their ancient books to summon powerful beasts which then engage in a furious battle. Takashiro notices that Reiga has not fully awakened and thus manages to overpower Reiga's summon beast, also injuring him in the process. As Takashiro readies himself to deal the finishing blow, Yuki stops him by pleading for Reiga to tell him that their past memories were not lies. Reiga leaves after cautioning Yuki not to trust all that Takashiro tells him.