Capítulo 646: Heard.

Pillars of dark light fell from the skies. It was as though the Heavens were intent on wiping the Shrine Plane out of existence. 

Ryu stood amidst it all, large swaths of dark gold fire flooding into him like a tide. His mental state reached a peak, a will to vent shaking him to the very depths of his core. 

For a moment, the eight geniuses were shocked silent. It wasn't that they couldn't defeat the Heaven's Warriors earlier, it was rather that they were trying to do so while conserving as much stamina as they could. This was nothing more than the first round and they were well aware of it. In fact, they found Ryu foolish for going all out, clearly having no idea that not only had Ryu barely used much of his strength, but even if he had, with the Southern Heavenly Wind … What did he have to worry about stamina for?