Lin Zhuang and Lin Chen, with the help of the Nameless Fruit, had already perfected their practice of the Body Refining Scripture. Any further progress was almost impossible to achieve.
According to Old Man Lin, the two of them were considered to have reached Completion in the Blood Realm.
Although Lin Xin Tong's training could still be considered unambitious, her natural talent was undeniable. Her rapid progress was inevitable.
However, Lin currently only had the Body Refining Scripture, and as Old Man Lin had said, it was strong but only limited to the Blood Realm.
The Blood Realm was about refining the physical body and boosting vitality to the point it was like a vast river. If the human body were compared to a vessel, refining it was about making the vessel bigger and more robust.