I Turned into a Grandpa

In the battle on the Dome of the Nine Domains, the Lord of the Seventh Domain fought alone against the Lords of the Eight Domains, killing five of them and severely injuring three of them. Seventy-three demigods and monks from the nine realms were slaughtered, and all were killed or injured. The seventh domain lord died of exhaustion. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.