Half a month isn't a very long time. However, as far as Wu Mu was concerned, the fact that he had encountered a certain Cultivator entranced with the idea of studying totems made it an unprecedented period of suffering. From his blood to his bones, from his totem tattoos to his techniques, his entire body was under the complete control of Meng Hao.
The more deeply Meng Hao studied the matter, the more confident he grew regarding the matter of concocting a Nascent Soul. Wu Mu seemed to have been destined to help Meng Hao understand how to fuse the Dao of alchemy with his Cultivation base. At the end of the month, it got to the point where he wasn't learning anything new from the man, so instead of causing further trouble for him, Meng Hao released him.
Before he left, Wu Mu looked at Meng Hao, trembling. He vowed to himself that he would never run into this man again, then fled as fast as he possibly could.