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Mark quickly helped Albert to lean against the cave wall, then held the fire sword in front of him to block the approaching monster. In the light of the fire, the appearance of the monster was more clearly displayed in front of Mark.

It had a lizard-like head, sharp teeth protruding from its mouth, a scarlet tongue licking its lips from time to time, a pair of cold vertical pupils flashing with fierce light, and its body was covered with shiny scales like obsidian. A disgusting fishy smell emanated from it, making Mark's stomach churn.

The monster let out a shrill scream and pounced on Mark. The scream was sharp and piercing, echoing in the narrow cave, and it hurt Mark's eardrums.

He dodged to the side and barely avoided the monster's claws. The monster's claws rubbed his clothes and the sharp claws left several deep scratches on the stone wall. Gravel flew and dust flew. Mark took the opportunity to swing the fire sword, a flash of fire flashed, and slashed the monster fiercely.

With a loud "clang!", the fire sword collided with the scales, making a sound of metal clashing. The monster's scales had strong defensive power, and the fire sword only left a shallow wound on it.

Despite this, the high temperature of the flame attached to the fire sword still made it roar in pain. It took a few steps back in pain, covering the wound with its claws, its eyes full of anger and fear.

In the cave, the fire flickered, illuminating Mark's resolute face. He held the fire sword tightly, the muscles in his arms tensed, ready to meet the next attack at any time.

Mark took the opportunity to step back a few steps, distanced himself from the monster, and observed the monster's actions. The monster's breathing was heavy, and its black nostrils opened and closed, spewing out bursts of smelly hot air. Wisps of black smoke came out of its injured part, making a sizzling sound. It stared at the fire sword in Mark's hand with fear, with a fierce light flashing in its eyes, but did not dare to attack rashly.

The monster roared again, swinging its huge tail like a black steel whip, sweeping towards Mark with a whistling sound of wind. Mark was prepared and raised his fire sword to block.

With a loud "bang!", the huge force made his arm numb and he almost couldn't hold the fire sword. There was a sharp pain in the tiger's mouth, and he gritted his teeth and withstood the blow.

Where the giant's tail swept, gravel flew and dust filled the air. He gritted his teeth and held on, swinging the fire sword again, slashing at the monster's head. The monster didn't seem to expect that Mark could quickly counterattack after bearing such a heavy blow, and he couldn't dodge in time, and his head was chopped by the fire sword.

The fire sword cut a deep wound on the monster's head, and black blood gushed out, splashing on Mark's face and body. The smelly blood made him feel sick.

The monster let out a shrill scream and stumbled back. Its head was bleeding, and one eye was scratched by the fire sword, almost blinding it. It rolled on the ground in pain, wailing.

Mark seized the opportunity and swung several swords in succession, each with a sharp flame, forcing the monster back.

The monster was forced into the corner of the cave, with no way to retreat. It roared in despair, its body trembling constantly, and its eyes were full of fear.

Mark raised the fire sword high, and the jumping flames on the sword reflected his resolute face. Sweat dripped down his chin and splashed fine dust on the ground.

He was ready to give the monster the last blow to end the battle.

The monster wailed in despair, hoarse and shrill, echoing in the narrow cave, like the last cry of a dying beast. Its huge body curled up in the corner, and its black scales were covered with blood and dust, looking miserable. Its injured single eye oozes thick black liquid, flickering strangely in the firelight.

Suddenly, the monster opened its mouth and sprayed a cloud of black poisonous mist. The poisonous fog came unexpectedly, spreading rapidly and enveloping Mark.

Mark was caught off guard and inhaled some of the poisonous fog. A pungent and pungent smell rushed straight to his head, and he felt dizzy, his eyes blurred, and his body began to weaken.

He staggered back, and the speed of swinging the sword slowed down. The flame on the fire sword also became flickering, as if it would go out at any time.

Seeing this, the monster endured the severe pain and pounced on Mark. Its huge body pressed down like a hill, with a fishy smell.

Mark was unable to resist and was knocked to the ground by the monster. The fire sword in his hand slipped out of his hand and fell a few meters away. The sword body made a crisp collision sound, and then dissipated in the air, leaving only wisps of green smoke.

The monster opened its bloody mouth, revealing sharp teeth, like saw teeth, with a chilling cold light. Its saliva dripped onto the ground, making a sizzling corrosion sound, and small pits appeared on the ground. It approached Mark step by step, and its fishy breath sprayed on Mark's face, making him feel suffocated.

At the critical moment, Mark kicked the monster's abdomen with force.

This time he used up all his strength, and the monster was briefly pushed away, uttering a painful groan.

Its huge body staggered back a few steps and almost fell.

The monster pounced again and grabbed Mark's back with its sharp claws. The blood immediately dyed Mark's clothes red, and the severe pain made him groan.

Mark used up all his strength to condense the fire sword again, and then stabbed it into the monster's abdomen with a backhand.

"Uh!" The monster let out a shrill scream, and its huge body trembled violently. Black blood gushed out of the wound like a fountain, splashing on Mark's body and face.

Mark gritted his teeth, pulled out the fire sword, and then stabbed it into the monster's wound again.

Once, twice, three times... He mechanically repeated this action until the monster completely stopped struggling and fell to the ground.

"It's over..." Mark collapsed to the ground powerlessly, and the fire sword in his hand also dissipated.

He gasped for breath, his chest rose and fell violently, and he felt that all the strength in his body had been drained.

Mark lay on his back on the ground, his vision blurred, and his ears buzzed. The sticky black blood smeared on his face, making him feel sick. He raised one hand with difficulty, trying to wipe the blood off his face, but found that his arm was as heavy as if it were filled with lead.