Yun Chen nodded and walked into the cave. The interior was exceptionally dark, as if even the light from the outside was completely swallowed up.
As he walked deeper, dull sounds suddenly echoed around him.
Then, candlelight flickered within the cave, and a voice entered his ears: "The inner realm is equivalent to the universe of heaven and earth. The initial opener must plant the spiritual root and grow the Tree of World..."
Chapter 328