The surface of the tortoise shell is covered with hard patterns, like a solid mountain range, giving an endless sense of security and protection.
It seemingly carries the secrets of heaven and earth and the wonders of the universe.
At the moment the tortoise shell appears, Immortal Lord Wu Xin feels an illusion that this tortoise shell can withstand the power of all things in the world, unbreakable and immortal.
Cao Zhen gathers all the celestial energy within him into the tortoise shell, and instantly, this tortoise shell expands this piece of heaven and earth.
In just a moment, all the celestial energy within him is completely drained. He is just a cultivator at the peak Earth Immortal Realm, not even having broken through to the Immortality Regainment Realm.
Moreover, this treasure is not something that can be controlled by the Earth Immortal Realm. It is a top-grade Earth Level treasure, the strongest defensive artifact he had previously obtained from the ruins.
