The Seven Deadly Sins Episode 15 English Subbed Episode Title:Unholy Knight.Episode Description:The Roar of Dawn soon realized they were fighting three of the Deadly Sins before Gowther decapitates the Armor Giant's head and gives it to their leader so they leave with their prize, Gowther revealing his armor was sealing a power that was consuming a Holy Knight as mutates into a monster. Meliodas lowers his guard upon noticing the Holy Knight still conscious as Gowther uses his Sacred Treasure, the Twin Bow Herritt, to place the monster in a trance as Ban rips the Holy Knight's heart out. But it didn't work as the Holy Knight, whom the group recognized as Dale, mutates into a demon. Meanwhile, Cain visits Elizabeth in the Boar Hat and reveals her resemblance to a knight named Liz who became Meliodas's lover during his time in Danafor. When the demon makes its presence known, Elizabeth gives Meliodas the sword that Liz intended to give him, allowing him to end the transform demon's misery as he and the others realize it was created by someone in the Holy Knights. At the same time, Helbram receives the Armor Giant's head and has Guila destroy the evidence of its existence.