User blog comment:B214/Talk About What You Want! 2/@comment-82.178.78.110-20140509093901/@comment-1359322-20140510003000

Then how do you explain Millicas, his strength is clearly out of leagues, if you ask me Millicas's strength is on par to the ORC at the beginning of the series. Meaning if Millicas does proper training, he'll be way stronger than Issei when he reached Issei's current age. Then imagine Issei's children, they'll inherit the Dragon powers (which has Great Red + Ophis) from Issei + the powers from their mothers. It's quite obvious that they'll be stronger than Issei at his prime.