Azesion-Dilhade War

Azesion-Dilhade War is a war that occurred between the human continent of Azesion and the demon kingdom of Dilhade. The conflict was orchestrated by Commander Jerga in an attempt to exterminate demonkind, but it was stopped by Anos Voldigoad and his allies before it could escalate into an all-out war.

Prelude
After the Great War ended with the Demon King Anos' sacrifice, magical barriers were erected to isolate the four races so that their hatred would disappear in due time. Knowing that the Demon King would return, Jerga founded the Hero Academy to pass on his hatred to future generations. He falsified the events that occurred, such as the Hero Kanon slaying the Demon King and raising the walls to protect the allied races from demon retribution. However, history books alone wouldn't be able to pass on the hatred they felt, so Jerga split his source into two magics: Jerga and Eleonore. As magic, Jerga instilled his hatred into the hearts of those who used Aske, while Eleonore was used to raise an army of cloned heroes.

Many supported Jerga due to the atrocities the Demon King committed during the war, but Hero Kanon opposed this since he was aware of the Demon King's true benevolence, so Jerga's supporters killed him as a result. However, the hero was able to fake his death and move to Dilhade, whose citizens were more understanding. His plan was to create a phony Demon King, Avos Dilhevia, to take the full brunt of humanity's hatred. He used Evansmana to sever Anos' fate as the reincarnated Demon King of Tyranny, completely erasing his name from history. Those who could not forget moved away from Dilhade and remained quiet until it was over, while the Hero Academy simply believed he had changed names. As part of his plan, six of the Seven Demon Elders willingly ceded control of their bodies to Kanon's other sources. With his remaining source, Kanon would reincarnate throughout the years as he made counter-plans of his own.

Declaration of War
Two thousand years later, when the Demon King was expected to return, the Demon King Academy and the Hero Academy held an educational exchange. While Dilhade saw this as a learning opportunity, Azesion used this opportunity to humiliate the visiting demon students and create justification for war. At the same time, Lay Grandsley, Kanon's latest reincarnation, sent the remaining three Demon Elders under his control to Gairadite. Together, they attacked the hidden temple where Evansmana was enshrined and reclaimed the holy sword, giving Diego his highly coveted justification. In Azesion, after the theft of Evansmana, Anos located the imprisoned Demon King Academy students, as they witnessed Diego's broadcast where he revealed that the "deepest darkness" has returned as the Demon King of Tyranny Avos Dilhevia stole the legendary holy sword along with his subordinates, three of the Seven Demon Elders. He lamented the theft of the holy sword and the fact that even after the war had ended, he had tried to extend a hand of friendship by holding the educational academy exchange. But the demons took advantage of his kindness and stole Evansmana and invaded human lands. He told the citizens that the king of Gairadite had reformed the Demon King Subjugation Battalion, which once defeated the demon king, as he proclaimed himself as Kanon's and true reincarnation. Meanwhile at the same time in Dilhade, Medoin Garsa, Zoro Angart and Eldora Zaia projected a magical broadcast to reveal that they had discovered the reincarnation of the Demon King of Tyranny, as Avos Dilhevia revealed himself in front of the citizens of Dilhade. He proclaimed his return as stated that he had sacrificed his life to divide the world and spared the humans out of mercy. Medoin showed a projection of the Diego's magical broadcast, and Avos stated that humans held on to the Sword of Three Races to destroy him, developed new techniques to kill demons and trained an army in the guise of the Hero Academy. He proclaims that there was no saving such foul, abhorrent fools. Revealing the stolen Evansmana, Avos proclaims that he has obtained humanity's greatest weapons, as his descendant didn't have anything to fear. He then announced his intention to destroy humanity with the aid of his followers.

Anos meet with his followers to discuss the fallout of recent events as they discussed how to stop the incoming conflict. While Anos initially wanted to fight alone, his friends and followers convinced him to let them fight as well. Before the grand battle, Lay reassured Misa and asked for half of her one-shell necklace due to a popular legend stating that it could reunite lovers in the afterlife.

The Battle
Both human and demon armies set up encampments on their own side of the border in the Tola Forest, as it was only a matter of time before they clashed. However, Anos had sent his companions to intercept the armies and delay them before they clashed, as Misha and Sasha were sent to fight the a band of demons that were trying to link up with the main demon army, while Lay and Misa took care of the advanced forward units of royalists that were advancing, with the Fan Union providing battlefield reports. Meanwhile, Anos and the Demon Elders aligned with him went to flush out Avos and his Demon Elders, as they attacked the base camp of Dilhade's army. The soldiers initially thought that Anos' Demon Elders were there to support them but Anos took advantage of that and launched a suprise attack to quickly overwhelm the army. After defeating them, Avos' Demon Elders revealed themselves and moved to engage Anos and his Demon Elders, as Anos took the chance to slip away in order to confront Avos in the Demon King's Castle. But Avos wasn't present as the castle only contained the Sword of Three Races. After confirming that, Anos received a Leaks communication from Misa as she stated that she lost contact with Lay, with Anos noting that his Gyze link with him was severed. Anos also receives a message from Melheis that they had defeated and captured the other Demon Elders, but the sources controlling them had abandoned them. Anos then realizes the truth about Avos Dilhevia's identity and intentions, as he ordered Melheis to isolate the Sword of Three Races inside of the castle with Azesith. He then teleports to the Azesion side of the border where he encounters Avos Dilhevia. leading the advanced units. Noticing him, Avos attacks him and manages to kick him aside, as Anos acknowledges him as Hero Kanon and Lay. Lay then removes the mask and reveals himself to Anos, asking how he was able to figure out his secret. Anos explain that various clues such as Lay's knowledge of the legend of the one-shell necklace, his ability to wield holy swords, his lack of recall after mastering the Sword of Intent and the sources fused with the Demon Elders allow him to piece together the mystery, as he asked Lay about his motivations for becoming Avos. Lay explains Jerga's plot to destroy Anos and restart the war, as Lay accelerated it because he intended to die in place of Anos. That's why he took command of the demon army as "Avos Dilhevia". He felt like Anos had already sacrificed enough, and it wouldn't be fair to take him away from the peaceful future he made.

Aftermath
Diego is sentenced as a war criminal for cutting off his adjutant's arm when he disagreed with Diego. Despite achieving their goal of killing the Demon King of Tyranny and making the Demon Army retreat, Diego called for the continuation of war until their enemies were annihilated.

Ninety percent of the people who had their hope forcibly drained by Jerga make a full recovery, while the remaining ten percent are in stable condition. His actions are erroneously believed to be the Demon King of Tyranny's, making him a symbol of fear in this age as well. To counter this false belief, Anos and Lay planned to reveal the truth about Avos Dilhevia during the Demon King Reordination Ceremony, while conducting a story on how Hero Kanon and the true Demon King fought together to defeat the fake Demon King.