On Mount Yandang lay Wild Goose Lake, its waters spanning thousands of mu. Beneath it was sealed a Divine Gun from more than four thousand years ago.
Shi Feiyang had chosen this place as the first stop on his treasure-hunting journey to the Central Land because a precious cauldron left by Emperor Yu the Great lay here.
King Yu of this world possessed formidable magical power. Long ago, the essence of the five directions and five elements had each given birth to sentient spirits. They colluded according to the generative cycle of the five elements, throwing the world into chaos and unleashing natural disasters on a global scale. Living beings were plunged into misery, and corpses littered the wilderness.
Yu the Great forged supreme treasures to suppress the earth's axis, then cast spells to force the five elements back into their proper places. The Mysterious Yin Water Matriarch, born from gui water, fought bitterly against him but could not prevail. In a rage, she fled west to join forces with the God of Geng Metal, intending to strengthen their source through Jin generating water and return the world to primordial chaos.
Yu the Great went west and forced the Mysterious Yin Water Matriarch back into her proper place, finally cutting off the source of the great Hong flood.
At the time, many monsters rode the floodwaters out to stir up wind and waves, and Divine Gun was one of them. Even then, he already possessed more than four thousand years of cultivation. Killing him would have been easy for Yu the Great, but he had certain ties to Yu the Great's father. Unwilling to strike him down, Yu the Great sealed him in the Red Ravine Stone Prison beneath Wild Goose Lake, imprisoning him below with the Great Yin Earth