Sudden tribulation.

You Xi wang sat cross-legged in meditation. His body was dripping wet with sweat. If someone looked close enough then a slight tremble could be detected on his body. You Xi Wang thought as he was immersed in his cultivation that his sister must have faced the same pain and burden while she broke into the Primal Soul Realm. His resolve strengthened after this thought passed through his mind. 

He gritted his teeth and urged the spirit energy to cover his soul avatar and integrate together. The system was busy overlooking the bodily functions as extreme pressure was a double-edged sword. Too much pressure and no matter how strong you are, you will break. The system did not want You Xi Wang's physique to break that is why it worked at an extremely terrifying rate to constantly divert the pain in You Xi Wang's body to other places. The system was micro distributing the pain originating from the soul sea to the whole body on a cellular level.