C2075 Underworld King Palace(2)

Hong Tao asked, "How did you know? "

"I read an introduction book in the depository of scriptures. Thousands of years ago, there were many wars between the righteous and the evil. The most recent was a war between the Sword Saint and Nether King, and both sides suffered heavy losses in the end. Both of them died. We just came to the Sword Saint's underground palace