Boom! Boom! Boom!
Thunderous explosions rang out one after another, unceasingly reverberating through the skies above Cloud Cover Continent, deafening to the ears.
"This is the Heavenly Drum Thunder Sound Tribulation!" Within the silver giant formed from the Ancient Battle Formation Heavenly Grandchild Suo Luo, Lang Ya Earth Spirit cried out softly.
His face was filled with shock and confusion.
"With every thunderclap, this Heavenly Drum Thunder Sound Tribulation produces invisible lightning bolts that strike directly within a Gu Immortal's body, blasting apart the tribulation-crossing Gu Immortal's internal organs. Its power can shatter mountains and split rocks, yet it combines sound path and lightning path, making it difficult for ordinary Gu Immortals to guard against. Encountering such a tribulation means nine deaths and one chance of survival. But Fang Yuan, you need not fear. This heaven and earth of ours is enveloped in refinement dao marks, which are themselves an exceptional defense. Moreover, I have methods to restrain it. As long as my Heavenly Grandchild Suo Luo remains, you will be safe and sound!"
In his urgency, Lang Ya Earth Spirit sent Fang Yuan a telepathic message. He feared that Fang Yuan would be distracted by concerns over the calamity and tribulation, causing the Gu refinement to fail.
Although Lang Ya Earth Spirit had his eye on Soul-Shaking Mountain, Fang Yuan's failure at refining Gu would suit his intentions perfectly. But Lang Ya Earth Spirit himself was one who honored agreements and kept promises. This Gu refinement was an agreement made long ago between Heavenly Thief Demon Venerable and Old Ancestor Long Hair, so he had to do his utmost to help Fang Yuan, without harboring the slightest ulterior scheme.
Fang Yuan floated in the air, turning a deaf ear to the rumbling thunder outside.
His expression was calm, and