The emerald green plunge basin may look green on the surface, but it had an unimaginable depth. Yi Yun had previously tried exploring its depths but had never managed to dive to the bottom.After submerging himself at about a depth of ten meters, he felt his ears hurting.Human ears were extremely vulnerable. The most unbearable pressure a diver experiences came from his ears. Martial artists were no different.As a person goes deeper, his eardrums will rupture before his organs could feel the pressure. Yi Yun blew up the air in his mouth. By increasing the pressure from his mouth, he could balance the external pressure surge, reducing the pain in his eardrums.After diving to an unknown depth, Yi Yun experienced poor light conditions underwater. Only by looking towards the water surface would he see the beautiful sunshine being transmitted down.In order to have a means of escaping danger, Yi Yun kept close to the cliff. Peppering the cliff were weird rocks. The rocks led downwards into a deeper depth that was complete darkness. It was a terrifying and bottomless darkness.Thankfully, Yi Yun had reached the Vigor realm; his breaths could last him a long while. With one breath, he was able to endure about fifteen minutes.On Earth, the breath holding record underwater was about thirteen minutes. Of course, those people had undergone professional training, and if Yi Yun trained himself more, his timing would be longer.As the pressure increased, Yi Yun felt his lungs being compressed. His abdominal cavity was filled with bodily fluids.The ribs enclosing his lungs were under immense pressure. It was as if a huge bear was stepping on his chest. Yi Yun even heard the creaking sound of his ribs.If not for the bone training he had just completed, Yi Yun’s ribs would most definitely have broken.With his abdominal cavity compressed, tremendous pressure was transferred to Yi Yun’s body, compressing his bodily fluids and organs.Slowly, Yi Yun felt his limit approaching.Diving was a dangerous sport. The moment one lost consciousness due to the water pressure, one was undoubtedly doomed. The corpse would slowly fall to the bottom and get completely crushed.On Earth, deep diving enthusiasts had to make all sorts of preparations such as ropes, balloons and other life-saving devices.As for Yi Yun, he naturally had none of that. He had to rely on his own assessments.“Splash! Splash!”