In the quiet depths underwater, Yi Yun could hear his own heartbeat and even the sound of his blood flowing.The sunlight in the mountains was already dimmer, but at these deep depths, one could say that Yi Yun was totally surrounded by darkness. Under a quiet, dark and high-pressure environment, the only thing that Yi Yun could clearly feel was the Purple Crystal Origins in his chest. That cool feeling flowed through his bloodstream.This cool feeling was like the fountain of life in fairy tales. Although it was extremely weak, it could ensure Yi Yun’s survivability. It allowed Yi Yun to stay conscious under such extreme conditions.This situation resembled the time he experienced the cave-in back on Earth. Trapped under the earth, the Purple Crystal had accompanied him in that quiet and dark environment.Yi Yun also felt that the Purple Crystal was like his life’s last refuge. When his organs were damaged under the immense water pressure, the Purple Crystal would silently repair his organs. It allowed him to not only experience the immense water pressure but also recover in the shortest time possible.Yi Yun lost his sense of time underwater. He kept following the theories of “Dragon Rib Tiger Bone Fist” by circulating his energies. When he felt his breath was mostly used up, he began to swim upwards.Deep-sea divers would usually not have much energy or air. As swimming upwards consumed a lot of energy, most people on Earth used devices like balloons to propel their bodies upwards, but Yi Yun had to rely on himself.This was without question a great test for Yi Yun’s heart and lungs.Under such immense pressure, breathing and heart beating experienced a hundred times more stress.Yi Yun held his breath, and by virtue of his willpower and the lifeline provided by the Purple Crystal, he swam upwards meter by meter!“Splash!” As Yi Yun’s head emerged from the water, he took in large gulps of air. His face was pale. His lips were white and pupils constricted.Having dived to a depth of more than a hundred meters for more than twenty minutes, Yi Yun could not believe that he had done it without any device except a rock. He was surprised at the degree he performed “Dragon Dancing in Vast Water” for the first time.Yi Yun swam towards land. His hair was dripping with water. After a few long breaths, he felt deeply that his body was no longer the same.The Power of Desolates energy had been completed digested. Before coming to the plunge basin, Yi Yun felt bloated with energy, but after this round of cultivation, he felt extremely hungry. It was as if he had not eaten for three days.This was the effect of “Dragon Rib Tiger Bone Fist”!The “Dragon Rib Tiger Bone Fist” combined with the Power of Desolates from the desolate bones had increased Yi Yun’s strength by leaps and bounds!“It really…feels great!” Yi Yun could not help uttering a cry.“Ka Ka Ka!” In the midst of this long cry, Yi Yun’s joints began to emit cracking sounds. Although they were not loud, they were extremely clear, like the sound of stirring steel pellets.“Thunderous realm, this must be Mortal Blood’s third realm, Thunderous!” Yi Yun was delighted. The five levels of Mortal Blood were natural endpoints after sufficient training. Without any bottlenecks, as long as one worked hard, with sufficient energy supplied, anyone could reach the fifth level of Mortal Blood.