Record of calamity: Legend of the cursed dragoon

10,000 years ago the monsters that walked the earth raged war on the gods. It was a gruesome battle but towards the climax of the battle the monsters were given a boost by the king of calamity aka the demon king but the monsters knew he wished to use them and rule over all life from the humans, demons, and even the gods.

So joining forces to fight their common enemy they were able to seal him away bringing a short time of peace...until...The gods not trusting the demons and knowing that they couldn't kill the stronger demons the still have a bit of power from the demon king gave 10 heroes magical weapons and armor with the power of legendary creatures.

The heroes were able to seal the stronger demons in weapons and seal the rest in the demon realm. now 10,000 years later not only are the demonic weapons known as the cursed Teigu being held by different clans so are the weapons and armor of the heroes known as sacred treasures. When a clam that holds the most powerful is attacked and has their Teigu stolen it's gonna take new heroes and maybe even one of the Teigu holders to save the world from the possible resurrection of the king of all calamities.