It is said that Shi Lei successfully applied the black muddy substance to collect the suspected Mustard Seed Spiritual Essence, a special substance located on the outer barrier of the Spatial Micro-World.
However, the amount of the black muddy substance in Shi Lei's hands was, after all, very limited. When he had collected only half of the strange substance, Shi Lei found that the black muddy substance could no longer hold even a tiny bit more.
Now, truly very little of the strange substance remained on the outer barrier of his Spatial Micro-World.
Chapter 160