C437 The Fox Pretending to be a Tiger

Gazing upon the skull shimmering with a crystalline luster, Zhang Yu finally exhaled a deep breath of relief. After enduring countless hardships, he had at last completed the refinement of his skull.

In that instant, Zhang Yu couldn't contain a low roar of triumph. Lightning crackled around him, as if he were a fish gliding through the sea, and he was awash with a sense of exhilarating freedom