Vali vs Issei

And in another place, Vali was fighting against Crom Cruach, and the battle between those two had caused immense destruction to the field. It was the first time that I had seen Vali’s Maouification, but…the quality of his aura was beyond belief! A mere blast of his demonic energy was sufficient enough to blow everything in its path away! All of the buildings surrounding them had already vanished, and their battlefield had become a vast open plain! Vali’s Maouification seems like it’s even stronger than my Dragon Deification!?

[Although there are aspects where you wouldn’t be inferior to Vali, Vali seems to be stronger overall.]

—Ddraig said. Moreover, Crom’s attacks were also extremely ferocious! Relying only on physical attacks and a dragon’s flames and aura, he was able to generate a tremendous impact on the field. Vali had no choice but to endure Crom’s violent assault. As their battle intensified even further, I had to wonder whether they would be able to decide a winner first, or if the field would collapse first as a result of the destruction caused by the battle of the two dragons—.

Volume 24, Life 5