245

The smoke and dust from the explosion gradually dissipated, revealing a mess in the passage. The ground was covered with rubble, the walls were charred, and the air was filled with a pungent smell of sulfur. Nidhogg let out a painful roar, and the three heads shook violently, and the black flames also went out, swaying a few times like a candle in the wind, and finally disappeared completely. Mark retreated with the shock wave of the explosion, and his feet plowed two deep grooves on the ground before he could barely stabilize his body. He wiped the blood from the corners of his mouth, staring at Nidhogg with a sharp gaze. The aftermath of the explosion caused ripples on his golden energy shield, and finally calmed down. He found that there was a charred mark on the middle head of Nidhogg, which was the mark left by his previous attack.

A trace of joy flashed in Mark's eyes. This was the first time he had left a noticeable scar on Nidhogg after fighting hard. He seized this fleeting opportunity and quickly condensed the remaining golden energy on his right fist. The golden light became more and more dazzling, as if a small sun was burning in his hand. The air made a sizzling sound, as if it could not withstand this powerful energy and was about to be torn apart.

"Now!" Mark shouted, and his figure shot out like an arrow from a string, punching Nidhogg's injured head. The golden energy condensed on his fist dragged a dazzling light tail in high-speed movement, like a meteor that cut through the night sky.

Nidhogg's huge body was unable to dodge, and was hit hard on the injured head by Mark's punch. A shrill scream resounded through the passage, and Nidhogg's middle head suddenly leaned back and hit the wall of the passage heavily.

"Boom!"

The runes on the wall flashed a strange red light, as if stained with blood, and made a harsh buzzing sound, the sharp sound seemed to pierce the eardrum. The passage also vibrated violently, and more gravel fell from the top.

Without any pause, Mark took advantage of the victory and punched again, aiming at the other two intact heads of Nidhogg. He was agile and moved like a cheetah in the narrow passage, and every punch was powerful.

Nidhogg's left head felt the fatal threat and suddenly spurted out a black flame, trying to stop Mark's attack. The flame, with a scorching breath, rushed straight to Mark's face like a roaring black python.

Mark dodged sideways, and the black flame brushed past his body and hit the wall of the passage. The hard wall instantly melted into a big hole, and the lava-like liquid flowed slowly, making a sizzling sound, and the air was filled with a more pungent smell of sulfur.

Mark's eyes flashed with cold light, and he saw the right time and condensed the golden energy on his left leg. He jumped high, and his left leg was like a golden lightning, kicking hard on the right head of Nidhogg.

"Bang!" With a muffled sound, Nidhogg's right head was kicked to one side, revealing the black scale gap on his neck. Although the gap was small, it was like a flash of lightning in the dark night, illuminating Mark's way forward. "Found it!" Mark's eyes focused and stared at the gap in the scales. Mark took a deep breath, and the golden energy gathered on his right fist, and the light became more and more dazzling, like a sun. He held his breath and concentrated, aiming at the gap in the scales on Nidhogg's right neck, and punched hard. "Hah!" With a low roar, Mark's fist hit the target like a cannonball. The tiny gap in the scales could not withstand this powerful blow at all, and the scales shattered, and blood and flesh splattered. Nidhogg let out a deafening scream, and the right side of his head fell down weakly. The vibration of the passage became more violent, and the gravel above his head fell like raindrops. Several pieces of gravel brushed Mark's shoulders, cut his clothes, and left a few shallow bloodstains. He ignored the pain and looked up at the top of the passage, and found that the cracks were expanding.

"It seems that this passage can't withstand the aftermath of the battle."

Mark retracted his gaze and looked at Nidhogg. At this moment, Nidhogg only had two heads. The head on the left was spewing black flames crazily, and the head in the middle was roaring low, as if accumulating strength.

Mark knew that Nidhogg's attack was coming. He quickly retreated a few steps to distance himself from Nidhogg. At the same time, he evenly distributed the remaining golden energy on his arms, preparing for the next attack.

The head in the middle of Nidhogg suddenly opened its mouth, and a black energy ball condensed in its mouth, emitting a palpitating breath.

Mark's eyes were stern, and he quickly dodged sideways, while crossing his arms to protect his chest.

The black energy ball whizzed out, brushed Mark's body and hit the wall of the passage.

"Boom!"

After a loud bang, a larger gap was blown out of the wall of the passage, and rubble flew everywhere.

Taking advantage of the gap between Nidhogg's attacks, Mark rushed up again. He went around to the left side of Nidhogg, avoiding the black flames spewing from the left head, and smashed the middle head with his right fist, which was condensed with golden energy.

Nidhogg seemed to have anticipated Mark's attack, and the left head quickly turned and bit Mark's fist.

The muscles at the corner of Mark's eyes twitched slightly, and he quickly retracted his fist and changed to an elbow strike, which hit Nidhogg's left head hard.

"Crack!"

The sound of bones breaking was clearly audible, and Nidhogg's left head was deformed and drooped weakly.

Now, Nidhogg only had the last head left.

Mark did not hesitate at all, condensed all the golden energy on his right leg, jumped high, and made a fierce flying kick, hitting Nidhogg's middle head.

"Bang!" The last of Nidhogg's heads was kicked out, hitting the wall of the passage, and then sliding weakly to the ground.