Solution

Number One had no idea what was happening in the real world and that made him a bit anxious. He felt like days has passed inside the training space yet he was still stuck at the same task. Even though time flowed much slower for him, that would still mean many hours passed without a single movement from him. 

"Why is this flame so hard to control?" Number One commented with a frustrated frown and rubbed his forehead. He knew exactly how to convert his Soul Energy into a fire but every time he tried, the flame turned chaotic and dispersed into the void. 

Number One knew the reason deep down but it only annoyed him further. He has struggled with the same problem since he started cultivating and that was his White Soul Talent. He shouldn't even be able to become a Soul Artist since his Soul Energy wasn't suited for cultivation.