Hero's Return

A Raging war between the Celestials and the Demons had spiked an extreme amount of destruction in all of the planes, a team of semi-powerful individuals fought alongside the Celestials with their leader sacrificing his life in order to deal a massive blow to the leader of the Demons. His reincarnation being born into the world centuries later, with the Demonic King on the road to recovery a boy by the name of Sora has to take up the mantle and win the fight that his predecessor had failed to finish.