"This secret is related to whether one can become the master of Spirit Mountain!"
The giant demon's Primordial Spirit looked at Xiao Yi with apprehension, sensing an unhesitating murderous intent from him. He was absolutely certain that if he couldn't produce something that would move Xiao Yi's heart, the next second would be when he was obliterated into ashes.
Left with no choice...
The giant demon could only reveal the secret he had guarded for thousands of years to Xiao Yi at high speed.
If the Celestial Dragon Supreme were to find out that the moment he resolved to kill the giant demon, the demon would get a premonition and spill the dreamt-of secret he had waited thousands of years for, just to save his own life.
He would probably cough up blood in frustration!
Over these past thousand years.
To draw out this secret, he would feed the giant demon living human blood meals, attending to him like a grandson serving his ancestor.