S1·E168 Stirrings of the Strongest

Yami and Vangeance are taken to the Spade Kingdom so that the ritual to open the gate to the underworld can begin. Despite how hurt he is, Asta tries to escape the infirmary to go and save Yami, however he is stopped by a mage named Nacht Faust, who also happens to be a devil-possessed. He offers to show Asta how to use his devil powers even better. Meanwhile, the Magic Knight Squad Captains hold an emergency meeting. The Golden Dawn has almost been completely annihilated, and Yuno shows up to the meeting, showing new resolve.