Ep 21. Beginning of the Holy War

The Seven Deadly Sins season 4 episode 21, titled "Beginning of the Holy War," delves into the backstory of the ongoing battle between the Goddess and Demon Clans. The episode starts with the Goddess Elizabeth meeting up with her father, the Supreme Deity, who reveals the truth about her past life and the importance of her continued existence in the war.

Meanwhile, the Demon King Zeldris and Estarossa, his younger brother, confront the Demon Fraudrin for his betrayal and reasons for becoming a spy for the Goddess Clan. In flashbacks, the audience sees how Fraudrin was initially part of a group of demons who desired peace with the humans, only to be betrayed by the Goddess Clan. This betrayal led to Fraudrin's transformation into a full-fledged demon and eventually his alliance with the Ten Commandments.

The episode also highlights the first Holy War, where the Demon Clan waged a war against the Goddess Clan with the intent to steal their magical powers. Seeing how his actions could destroy the world, the Demon King Meliodas sacrifices his emotions and relationship with Elizabeth to end the war and seal the Demon Clan away. However, the episode reveals that this seal could be broken if all of the Ten Commandments were to be reunited, leading to the current conflict.

As the episode comes to an end, Elizabeth finally understands the significance of the Holy War and her role in the ongoing conflict. With newfound resolve, she seeks to confront Meliodas and find a way to end the war once and for all.

Overall, "Beginning of the Holy War" is an important episode for fans of the series, as it provides a deeper understanding of the conflicts and motivations of the characters. The episode's flashbacks flesh out the history of the world and set the stage for the upcoming battles between the Ten Commandments and the Sins.