Zhou Shu had heard of the Demon King realm, which also was the Grotto-Heaven realm that Shi Changsheng had mentioned, for a long time. But this was the first time he had seen someone break through.
Previously, when he fought with Demon Queen Tushan, to be honest, he didn't think that she was that powerful. Under the eruption of his divine ability Total Annihilation, he had even cut off one of her tails.
Seeing Yao Li's breakthrough, Zhou Shu was shocked. At the same time, he had a better understanding of the Demon King realm.
Even he might not be able to survive such heavenly might.
If every Demon King had to go through this stage in order to advance, their strength would definitely not be weak.
Perhaps it was just an accident that Demon Queen Tushan had lost to him.
Zhou Shu saw with his own eyes that the aura of Yao Li was constantly becoming stronger. But his injuries were becoming more and more serious under the lightning.