User blog comment:B214/High School DxD EX/@comment-50.139.232.230-20150817030437/@comment-108.224.166.119-20150817162935

I wouldn't be surprised if he's as strong as the heavenly dragons maybe even stronger he did declare in the spoilers for volume 20 that he was going to become the strongest dragon. And his sons did say he has been beating back the forces of the evil gods