Rengoku Oni Giri and Oni Giri in general since the beginning of the story have always
been close range techniques..
King of Hell Mode leveled up Rengoku Oni Giri into a long range attack, meaning a Flying Slash..
Yet Zoro hasn't changed anything to it's dynamic, it's the same execution..
What changed is the power output that Enma provides when Stabilized or '' mastered ''..
King of Hell Rengoku Oni Giri is a Flying Haki Slash on the same level as Black Rope Dragon Twister..
They both are base CoA infused..
Now the most interesting part is that Zoro's Black Lightning on his Blade are up before the attack..
And then, after Zoro delivers the attack, the Blades are Discharged of their '' Haki ''.. That '' Haki ''
was transfered into the level up Flying Slash attack..
Again, the Green Smoke remain, but the Black Lightning is fully spent..
2 things can be infered from this..
- The Flying Slash is Base CoA Coated
- The Black Lightning on Zoro's Blades is CoA as well
What Enma does, is level up CoA Swordsmanship tecniques..
Previous non Flying Slash attack are turned in Hakied up Flying Slash effortlessly..
Previous Flying Slash like Black Rope Dragon Twister will be turned in CoA Hardened Flying Slash..
Here you go, another proof that Zoro doesn't have AdCoC..