Boom! Boom! Boom!
Thunderous explosions rang out one after another without end, resounding across the skies above Cloud Cover Continent, deafening to the ears.
"It's the Heavenly Drum Thunder Sound Tribulation!" Within the silver giant formed by the Ancient Battle Formation Heavenly Grandchild Suo Luo, Lang Ya Earth Spirit cried out in a low voice.
His face was filled with shock and confusion.
"With every thunderclap, this Heavenly Drum Thunder Sound Tribulation produces invisible gale lightning that directly strikes within a Gu Immortal's body, blowing apart the tribulation-crossing Gu Immortal's 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 at life. But Fang Yuan, you need not fear. This entire heaven and earth is enveloped by refinement dao marks, making it an excellent defense in itself. Besides, 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 a telepathic message to Fang Yuan. He feared Fang Yuan would be distracted by the calamity and tribulation, causing the Gu refinement to fail.
Although Lang Ya Earth Spirit had designs on Soul-Shaking Mountain, Fang Yuan's failure at refining Gu would happen to suit his intentions. But Lang Ya Earth Spirit was one who honored agreements. This Gu refinement was an agreement made long ago between Heavenly Thief Demon Venerable and Old Ancestor Long Hair, so he had to do everything in his power to assist Fang Yuan, without the slightest ulterior scheme.
Fang Yuan floated in the air, turning a deaf ear to the roaring thunder outside.
His expression was calm, and his heart was