Rumble!! Pitch-black clouds churned across the sky. Boom!!! A heaven-shaking, earth-shattering explosion rang out, followed by thunderous cracks that shook the entire sky. Five-colored spiritual light surged overhead!
An enormous light barrier shimmering with five-colored spiritual light appeared in the air!
A gigantic, pitch-black claw resembling a dragon's talon, tens of thousands of feet across, slammed into the barrier. Rings of tremendous five-colored spiritual light rippled over its surface...
Boom, boom, boom!! Rings of black-lit spatial rifts burst across the sky, and wild ripples swept through heaven and earth...
"Damn the Human Race!! The Human Race!!" the Heavenly Thunder Beast roared in absolute fury. Its enormous, pitch-black dragon claw battered the five-colored barrier again and again, yet it simply could not break through...
Rumble!!
Boom, boom, boom!!
"Let me out!!!" The Heavenly Thunder Beast was utterly enraged. It struck the barrier overhead again and again, roaring as its massive claws hammered the five-colored light barrier and unleashed earth-shattering explosions...
"Damn humans! They actually found it! Damn them!! Damn them!! Aah!!!" The Heavenly Thunder Beast bellowed in fury, its thunderous voice reverberating throughout the sky.
Why was the Heavenly Thunder Beast so furious?
As it turned out!
Human cultivators had finally appeared on the Thirteenth Layer. Ever since the Hell Tower had been built, the Heavenly Thunder Beast had been imprisoned here like a dog. Hundreds of thousands of years had passed. Naturally, it was furious...
However!
If the cultivators really knew that, who would dare descend to the Thirteenth Layer?
As for why the Heavenly Thunder Beast had been imprisoned on the Thirteenth Layer...
It really was serving as a watchdog. A soul contract had been planted deep within its soul, compelling it to prevent any cultivator, demon beast, other creature, or even member of the Devil Race at the