King of Chaos arc

The King of Chaos arc is the nineteenth arc in the series, lasting from the 335th chapter to the 343rd chapter.

Description
Shorly after Demon King's defeat, Merlin assembles the rest of the Seven Deadly Sins and reveals to them her own secret agenda: to break the seal on Chaos, an ancient and alpowerful entity within the deceased Arthur which resurrects him. Unexpectedly Cath reveals itself as a monstrous creature who craves Chaos' power for itself and tries to devour Arthur in order to achieve it. As result, the Seven Deadly Sins must help Merlin and Arthur so they can save the recent found peace in Britannia.

Fights and Events

 * Seven Deadly Sins & Arthur Pendragon vs. Cath Palug

Story Impacts

 * Arthur is revived and becomes the King of Chaos.
 * Merlin and the Lady of the Lake reveal the existence of Chaos, the entity that created the gods, the five races, and the world itself.
 * Cath is revealed to be the monstrous Cath Palug, a tyrant beast born from the Mother of Chaos who desires the power of Chaos itself, by devouring Arthur and succeeds in devouring his right arm.
 * Arthur tries to reason with the monster, who explains it only protected Arthur to take his power once awoken, but is temporarily defeated by the young king using a reformed Excalibur.
 * Merlin attempts to cut ties with the others, thinking she can no longer be their friend, but they return to help her and Arthur when Cath returns in it's final form.
 * Arthur declares to Cath that he will rebuild Camelot as an "everlasting kingdom" and absorbs the monster, accepting his position as the King of Chaos, with Meliodas and the others supporting his new goal.