He's definitely using both CoA + CoC. His hand is coated black.
We've already seen CoA + CoC
This is just CoA Ryou instead of CoA Hardening
We've already seen CoA + CoC
![](https://coub-anubis-a.akamaized.net/coub_storage/coub/simple/cw_timeline_pic/79fb590172d/dc55769033b8032b97c55/ios_large_1538250702_image.jpg)
This is just CoA Ryou instead of CoA Hardening
In case before even the clash happening, you can see lighting sparks around the CoA attack.