The person seated cross-legged on the peak of the metal mountain was Fang Xingjian, who had just stepped into level 29 awhile ago.
The reason he had come to the Horned Frogs Valley was so that he could use the thunderbolts from the skies to temper and increase the toughness of his body. He wanted to increase his body's toughness from being comparable to that of a level 28 Divine Weapon to one that was level 29, thereby completing one tier of perfection after reaching level 29.
Fang Xingjian had even created the metal mountain under him by controlling the geomagnetic forces and applying the profoundness of the Mountain Shifting Sword. Although the Mountain Shifting Sword had long been synthesized into the Prodigious Demolition Sword Physique, the essence of it was still there, thus allowing Fang Xingjian to use the sword force to guide the forces in the ground.