Star Form blessed land.
Poisonous fog was spreading, poisonous blood was boiling, three layers of Gu formations were already destroyed by corrosion, the surrounding land turned into a thin layer of poisonous swampland.
Fang Yuan's face was stern.
"Next is the most troublesome and difficult to process immortal material, earthly limit astral qi."
He took out an immortal material and held it in his hands.
This Gu refinement material was very peculiar, it was made up of soil and qi. They gathered into a lump.
At the top was light azure colored astral qi, below was black soil.
Astral qi was the heaven qi found up in the nine heavens. Outside the immemorial nine heavens was a thick wall of astral qi. If a Gu Immortal wants to explore the nine heavens, he would need to break through the astral qi wall.
Meanwhile, the black soil was made up of the essence of earth qi condensed from the ten depths.
