The crossbow arrow that pierced Zhang Lihua's body was already defunct upon entry, and Lu Yu had no way to remove it.
After leaving Luoyan Valley, Lu Yu rushed back to Beifeng City with the fastest speed, transported back to the secret realm, and began his experiment.
All the materials, except for wolf hair and rabbit hair, were easy to buy; only the wolf and rabbit hair had to be collected by Lu Yu from the original hosts.
Utilizing artifact refining technique to process the materials, he inscribed four layers of restrictions on the pen shaft, activated the restrictions with spiritual power, and fused several materials, completing the refining process of the spirit-marked pen.
Looking at the spirit-marked pen emitting black smoke in front of him, Lu Yu knew without trying that he had definitely failed.
