Unholy Knight Episode 15

The sins confront a strange demonic being. Meliodas is about to deal the final blow when he loses heart and stops attacking. In the meantime, Elisabeth discovers some facts about Meliodas's past. In the end, Elizabeth rushes to the battleground and her words give Meliodas the courage to fight to his full potential. When the sins inspect the dead body of the monster they find out it was some kind of hybrid between human and demon.