The sea of fire used for artifact refining was terrifying beyond measure, even the black fire dragon that belonged to the Heavenly Nether Bird was set ablaze, which shows just how frightening it truly was.
This scene caused the Heavenly Nether Bird's expression to change. It asked in a deep voice, "Kid, have you been to the Refining Cave?"
To be honest, these flames wouldn't overly intimidate the Heavenly Nether Bird, as it had ways to deal with them.
However, what made it truly fear was the fact that the opponent could actually subdue these flames.
A young human with only the cultivation of the Seventh-layered Heaven Venerable had subdued such terrifying flames, which left him deeply shocked.
One must know that inside the Refining Cave, there lay a Supreme Divine Weapon that even he dreaded. If the opponent were to obtain that Supreme Divine Weapon, it would greatly increase the threat to him!
