This sudden idea had reminded him of something.
Even after returning from the other world, Chen Shouyi was still turning it over in his mind.
Just because other people had no way of doing it didn't mean he didn't. Wasn't that how he had come up with the Body Hardening Technique in the first place?
With the Book of Knowledge's ability to make deductions, as long as he had a direction and a rough idea, it could refine them into a suitable technique.
The hard part, though, was finding that direction.
There were traces to follow with Body Hardening. The ancient body-hardening methods passed down through the ages might have been ineffective and full of exaggerations, but they had some use. As for techniques for refining the brain, Chen Shouyi didn't even know whether any existed.
"I'll look through the library tomorrow." Holding the Long Sword, Chen Shouyi thrust it forward again and again. As he felt how his body exerted its strength, he thought to himself.
Just then, he had a thought.
He set the sword down.
He walked to the cabinet, opened it, and took out a suitcase.
He quickly undid the suitcase's combination lock.
Before opening it, he glanced at the bed. Shell Girl's tiny body was curled into a ball, sleeping soundly. He let out a barely perceptible sigh of relief, then looked away and gently pulled open the zipper.
Inside the suitcase lay a test tube half-filled with golden-red liquid. There was also a sealed packet of Divine Blood soil, as well as a section of a Barbarian God's Finger Bone.
Except for the Barbarian God's Finger Bone, everything else was the First-Generation Divine Blood he had obtained the last time they cleared out a Giant Sickle Worm nest.
More than half a year had