Yu Sui watched as the charred skeleton reached out from behind her, grasped the black shadow of a sword in the water, and sprouted several tiny Crimson Flame Crystal Flowers on its wrist. The flowers hissed, sending scalding steam billowing through the water. When they fell off, new ones grew in their place.
The Black Skull opened its mouth and let out a piercing roar underwater. Even the water curtain could not muffle its cry. It grabbed Yu Sui by the back of her collar with one hand and raised its sword with the other, slashing at the water's surface.
The Black Skull lifted Yu Sui out of the water. The underground river, which had been bone-chilling moments ago, suddenly felt warm.
White steam billowed all around. Along with the Black Skull's incessant, piercing roars came the sizzling sound of the Crimson Flame Crystal Flowers on its body going out in the water.
Yu Sui shook the water from her face and widened her eyes as she looked ahead. The Black Skull was half submerged, its upper body rising above the water and towering over them. Its back was hunched, and its pitch-black skull turned from side to side before it let out a furious roar. An invisible Sound Barrier spread outward, churning a vast expanse of Five Elements Qi.
Lin Chenghai had just dodged the Heavenly Dipper Earthly Fiend Thunder. He swung his staff to block the Sound Barrier and cursed, "What the hell is that now?!"
Yu Sui scratched her head, wondering the same thing. What is it, exactly? Is it my sword spirit? It doesn't seem to listen to me, though.
The water splashed again. Yu Sui was just about to turn around when Mei Chengyu emerged from the water, his expression dark. His gaze fell on