Since he had only found some medicinal ingredients for Soul Power so far, raising his Soul Power first would be a good choice. The more substantial his accumulation of Soul Power, the greater the power that would erupt after he entered the Xiu Zun Realm.
As before, Mu Bai took medicinal pills while using Beast Cores for Body Refining. Only after he had exhausted every Fourth-Level Beast Core in his Soul Bag did his Soul Power accumulate to a level that satisfied him.
"Looks like I'll have to go deeper!"
Although Mu Bai worried that a Demon General of the Beast Race guarded this place, how could he catch a tiger cub without entering the tiger's den? He was also confident that he could avoid discovery. After all, having cultivated the Five Elements Spirit Pill, he could travel through anything in the world. With that advantage, finding something in Ten Thousand Beast Valley without anyone being the wiser would not be difficult.
At that thought, Mu Bai plunged into the earth, descending nearly a thousand zhang before turning toward the valley. Many Demon Generals might possess formidable combat strength, but they were often not adept in mental power. Besides, no one would keep their Divine Sense spread out on guard day after day; they merely relied on defensive formations for protection.
Traveling underground, Mu Bai naturally had no need to worry about being discovered. With no formations obstructing him, his journey was smooth and extremely swift.
As he traveled, Mu Bai spread his Divine Sense, clearly perceiving everything underground around him along the way. Whenever he encountered anything valuable, he unceremoniously tucked it into his Mustard Seed Bag. Before even reaching the valley, he had already reaped a rich harvest from just over half a day of traveling and searching.