Well seeing as I have nothing better to do at the moment......Armored Doku has several powerful abilities as a Samurai, and I think Vergil's also a samurai 313. At least that's what I've been told...nonetheless a powerful and formidable devil.
Doku massacred and burned the entire Hayabusa village and has extraordinary abilities. His sword is a cursed weapon that feeds off souls of those it slays, can be split into two, and used as a boomerang. He can also travel at a burst of high speeds when doing certain attacks. He has one attack where he hits the ground and sends a shockwave that hits anything on the battlefield, and finally can shoot some kind of blue flame that is not an ordinary flame. He could be made out of that substance.
His spirit form has...flight, greater speed and is larger. He has a larger, longer spiritual form of the Kitetsu as well that drains more health and can be thrown for longer distances. He can simply vanish into thin air and appear in random locations, go through walls and shoot flames like in his regular form. The flame looks exactly the same as himself expect he's shaped to look like an armored samurai. Video:YouTube video