Giant Fierce Beast

"Retreat!"

Book Elder's pupils constricted as he shouted urgently. At the same time, he flung a strand of viscous flame onto the cavern ceiling to serve as illumination.

The next instant, a thick black, oily substance erupted from the Fierce Beast's mouth amid a foul wind, forming a tidal wave that swept toward them in the blink of an eye.

Huo Lin activated his Martial Soul Possession and stood shoulder to shoulder with Book Elder. The two blocked the front, intercepting the impact for Lin Huo and the others.

The black tide was split down the middle by the power of the two Soul Douluo, pouring straight into the deepest part of the cavern and causing violent tremors.

A few breaths later, despite the cavern being vast enough to allow the over-twenty-meter-long Azure Sky Flame Dragon to move freely, its floor was now covered by a thick layer of the oily substance.

Lin Huo beat his Azure Sky Twin Wings and held Huo Wu's slender waist as they flew through the air.

Huo Tian grabbed Huo Wushuang by the shoulder and leaped upward, driving his hand into the rock to hang from the cavern roof by brute force.

Book Elder and Huo Lin, meanwhile, stepped through the air using the flying traits of their Martial Souls.

Though none of them knew what the black oily substance was, no one wanted to risk testing it with their own body.

Lin Huo stared at the substance covering the ground, strange thoughts continuously surfacing in his mind.

Petroleum was here. Where was the mold?

The moment that thought arose, coupled with the pungent smell flooding his nostrils, Lin Huo immediately realized something was wrong.

"Careful! This stuff on the ground is flammable!"

As soon as Lin Huo's words fell, a trace of mocking