User blog comment:B214/Talk About What You Want! 2/@comment-82.178.75.30-20140714174922/@comment-24098614-20140714222509

Dulio would win nothing personal against Issei and Vali but he has one of the best Sacred Gears in the whole series because if you can control the weather at the extent that he can then Issei and Vali are whipped like Dogs. I suggest you read Volume 12 because he accompanied Sirzechs into the realm of Hades and he froze his Entire Realm, and most of the Grim Reapers that to me is scary to say the least.

The Sacred Gear that Dulio has is scary because it makes him look like a God in so many ways because when you can control the weather at such extent you can do anything to your opponents.