Meliodas, Ban, and Wild finally confront the Demon King in purgatory. To escape from purgatory they must get past the Demon King who guards the gate. However, they struggle in their effort, for the Demon King has the ability to steal their attacks. Even after 60 years have passed since the start of the battle, they still cannot find a clue to victory. However, in the battle, Ban learns how to "give" magical power to others. In the wake of that change, Meliodas comes up with a secret plan to defeat the Demon King.
Fourth season of Nanatsu no Taizai.