The cause-and-effect relationship here, Han Yi originally guessed that the change in the Sea of Blood had something to do with the Yuan Beast Sect.
However, now that the Yuan Beast Sect has been destroyed, if you think about it, it's not just a simple matter of the Yuan Beast Sect. This is more like a cause-and-effect relationship of silencing witnesses by murder.
Someone used the Yuan Beast Sect to cause the sea of blood to mutate and then exterminate the Yuan Beast Sect to achieve the purpose of cutting off clues.
However.
This is just Han Yi's preliminary guess.
There are still many unanswered questions here.
Perhaps, he might be completely wrong about his speculations.
"By the way, what's going on with the sea of blood?" Han Yi asked.
Shen Ping shook his head.