Tong Yang's face showed a hint of bitterness as he said, "The cultivation technique I practice is called the 'Demon Serpent Devouring Spirit Sutra,' derived from the 'Heavenly Dragon Demon Transformation Scripture.' That old demon wants to devour the dragon energy of the serpent that we cultivate, to transform and become a Jiao, breaking through to Nascent Soul."
"How did you find out about the location of his seclusion?"
...
As they continued to interrogate him, and with Tong Yang's renewed oath, the demeanor of the Golden Core cultivators from Shen Leishan became very grave.
But now there was a very thorny problem, the Old Demon's place of seclusion was deep within Wind Corruption Prefecture, inside the gates of Yin Wind Cave!
Even though they knew the exact location, they had no way to disrupt his sacrifice and breakthrough!