Ryu smiled from start to finish. It was a bit of a surprising change, and he found this young man to be interesting. It was unfortunate that turning him into a Summoning would cause more trouble than he was ready to deal with right now. Although the Black Thunder Wraiths weren't Demon Kings, they were still too powerful to ignore. And obviously, this young man was probably the best of their younger generation.
The descendants of Skeleton Kings couldn't be underestimated. The Skeleton Races in general were quite difficult to do with because they didn't have any obvious weak points and they could cultivate their bodies a lot like how blacksmiths tempered treasures. Without having to worry about the frailty of flesh, one could imagine their strength.
Yet, this young man had sent one of their best flying with a single palm and stood amongst their elders without a single care in the world.