C357 Monster? Remnant Spirit??

Boom!

As Ye Tian's heart raced with silent alarm, the laboratory echoed with a series of violent, thunderous roars that shook the very ground. The metal walls were increasingly marred with dense claw marks and numerous fist imprints, each collision reverberating with a terrifying force.

Even Ye Tian couldn't help but feel a surge of fear at the sight