Dark gods summoning

There was a legend of demons ruling all ten realms.the leader of the demon was named uaang tosamaki .he suffered pain and because of his death of his teachers who he took as his parents and wanted to reign havoc on others and one of the lords of the nine realms was the brother of his teacher yang uaang then challenged him to a battle thinking he was the one who slaughter yang the two demon clash in battle the brother of yang was known as the destroyer Shinto Shinto summoned a magic circle from the sky and a red glowing plasma came but with one word uaang shattered the red plasma he said "DISATERR"and Shinto was shocked then with uaang two blade slaughter him and stabbed him eight more times then out of nowhere a golden hair hero stabbed him and said "the reign of darkness has ended now may light shy upon this ream ,I am the holy savior hero calder "dragons,giants,sprites cheered him on as he was known as the hero of the nine realms 900 ,years later a 15 year old boy asked his teacher is true that this is the year the moon turn red

This is the year that blood pours like water

This is the year uaang return