Seven Deadly Sins, Four Archangels & Zeldris vs. Demon King

Seven Deadly Sins, Four Archangels & Zeldris vs. Demon King is a battle between the Seven Deadly Sins, along Elizabeth Liones, Hawk, two of the Four Archangels and Zeldris against and the Demon King.

Prologue
After recognizing Elizabeth and the Seven Deadly Sins and regret that Zeldris remains attached to Gelda as Meliodas to Elizabeth, everyone understands that they are not talking to Meliodas but to the Demon King. Zeldris demands his father explain why he is in the body of his brother after having told him to crown him as his successor, leading the Demon King to reveal that he never intended to give the throne to his treacherous son and that what he really wanted was a young and strong body.

Battle
After being confronted by Elizabeth and the Sins who demand that he leave the body of Meliodas, the Demon King says that he will free Elizabeth from his curse, but only to be able to kill her brutally. Wondering what face Meliodas will put on him when he sees his corpse and if he will become depressed and want to join her in the afterlife or perhaps relieved of not being held back for her. After Gowther saves Elizabeth from his murderous attack and puts under the protection of Merlin's Perfect Cube, King, Diane and Mael attack the Demon King with physical attacks knowing that the magic does not work against him, but the Demon King easily defends himself from all their attacks and incapacitates everyone with a simple movement. He states that the resistance is useless and that Elizabeth must let him end her miserable life for good. Hawk begins to provoke him and warns him to not kill Elizabeth. The Demon King destroy Hawk's little Perfect Cube with his claw, heavily wounding him, saying that it is very irritating and that he will send him to where his brother is. However, Hawk is snatched from his clutch by Ban, who states to take the Demon King out of Meliodas' body.

The Demon King sarcastically asks him how he intends to get him out, which Ban says he will simply do. Calling him a foolish child, the Demon King says he has the power of a god and releases a toxic and caustic storm over the entire area. Ban, however, supports it without problems, stating that compared to what he experience in the Purgatory that is just a nice breeze.

The Demon King tries to attack him with his claws, but Ban uses his speed to evade and punch him in the face that the Demon King manages to block, having to stop his storm in the process. The two then enter a physical contest, after receiving a kneeling of Ban, the Demon King responds with several quick aces that Ban manages to evade and respond with many short and quick blows. The Demon King however manages to strike him in the stomach and back, claiming that he was a fool believing he could do something against him by his own. However, the blows begin to affect the Demon King, to which Ban says he is not alone.

Inside the body, the emotions of Meliodas confront the Demon King. This affirms that even if he managed to return, he would not let him do what he wants, since bringing death and fear is his duty and his own existence. However, Meliodas evades his sword and elbows him to knock him down, claiming that this is also his sin. After regret not having destroyed them in the Purgatory, the Demon King continues his fight against Meliodas and Ban. In both scenarios, their attacks are completely bypassed. Ban responds with a strong kick to the head, while Meliodas confronts him with a sword of darkness. The Demon King is surprised that Meliodas repels his attacks, to which Meliodas tells him to leave at once because his true body in Purgatory feels lonely. The Demon King reminds him that now that his body awoke the power of the Demon King, he could no longer be in that world for more than a day, but Meliodas affirms that it is okay as long as he can break the curse of Elizabeth and say goodbye to the Seven Deadly Sins.

In the living world, Ban manages to strike hard at the Demon King, while in the spiritual world, Meliodas cuts off his chest and one of his horns. There, the Demon King tells Meliodas that there is no need to go and look for Elizabeth, because she is already dead and that he could never have her in his arms again. Meliodas calls him a liar, but even so Meliodas succumbs to the sadness of this possibility and there the Demon King sees the opportunity to attack him. This gives the Demon King the opportunity in the living world to regain strength after having been stamped against the ground by Ban, holding him by the neck with his claws and piercing the abdomen with his fingers. The Sins try to talk to Meliodas to help Ban, but the Demon King tells them that their voices never reach him in the spiritual world.

There, the Demon King tells a badly beaten Meliodas that embracing the despair in that spiritual world is accepting death. The Demon King tells him to sleep and leave everything to his father because there is no one out there waiting for him. However, Meliodas is backed by Elizabeth and the Sins, who entered the spiritual world thanks to Gowther's magic.

The Demon King is infuriated by their presence there and attacks with intention of eliminating them. However, Meliodas is able to repel his attack and knock him down with several holes in the chest. As the Demon King ask how is he able to have that power, Meliodas stats that he has lost any chance of defeating him since his friends's existence and emotions have given him strenght.

In the real world, The Demon King suffers the damage of Melodias's attack that forces him to release Ban. There, he decides to cut off his son's power source by murdering Elizabeth and the Sins whose physical bodies were immobile under the magic of Gowther. Mael and Ludociel jump to protect them, but the Demon King says that some Archangels like them have no right to challenge a god.

The Demon King sends his ornaments to the sky which are transformed into a great face called Tansoku no Kenjin. When Ban uses his Snatch to send the face to the ground, the Demon King sends him flying with an elbow, ordering everyone to stay out of their family affair with their son. The Tansoku no Kenjin releases a powerful attack from its mouth, which devastates much of Camelot. Ludociel manages to use his Sanctuary to protect himself along with Mael, Hendrickson, Elizabeth and the Sins, but the Demon King says that nothing will be left of him in five seconds. Ban resists Tansoku no Kenjin's attack and decides to stop the Demon King before he kills the others, but the Demon King manages to keep on par with him in a fight.

However, someone intervenes by stopping the Tansoku no Kenjin by piercing it with his sword, leaving everyone surprised when it is revealed to be Zeldris.

The Demon King asks Zeldris to tell him the reason for his actions. Zeldris tells him that he wants him out of his pending affairs with Meliodas, but before that he has something to ask him: if he knew about his relationship with Gelda when he ordered him to execute the Vampire Clan. The Demon King says the he is a fool for not understand that he did it to save him from himself and his own weakness. He reveals that the Commandment that he bestow to him have revealed everything about his secret love with Gelda, the sealing of the vampires and the hope to reach the throne of the Demon King to create an underworld in which everyone could live in peace, something that the Demon King calls pathetic.

The Demon King states that Zeldris' loyalty was what saves him all that time, but he will no longer turn a blind eye. He then creates Setsuna no Inja, a spell creature, to fight Zeldris, while the Demon King continues his fight with Ban. While in the spiritual world, the Demon King spirit is being overpowered by Meliodas, who uses several concentrated darkness spheres to penetrate his armor and flesh. With his sword destroyed, the Demon King falls bloodied from Meliodas attack, who contents to end the fight with his next attack.

As Zeldris defeats the Setsuna no Inja, the Demon King shoots a energy energy bolt that cut open Zeldris' chest. As Mael points that magic is not supposed to affect Zeldris, the Demon King reminds Zeldris than that is a power that himself gives to his son. Ban take the chance to recover and hits the Demon King with a kick.

Ban strikes the Demon King with fury claiming that Zeldris is his own flesh and blood. The Demon King hits him back stating that he does not need weaklings in his bloodline. Ban gives another strong blow leaving him in bad condition. At the same time, the Demon King is riddled by Meliodas's Trillion Dark. At the doors of his demise, the Demon King begins to fly across the battlefield in a state of madness, in a desperate attempt to take Meliodas to the death with him.

Ban manages to intercept and stop his death throes, and then send him flying with a kick. King, Elizabeth and Merlin then combine their techniques in their Combined Technique: Triple Prison leaving the Demon King trapped. This however manages to break free in a berserk state. There, Diane surprises him with her Diamond Tower, giving Ban the clean guy to give the Demon King the final blow. With a strong fist that sends the Demon King to break the diamond, this is finally defeated and erased from the body of Meliodas.