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Mark took a deep breath, raised his fire sword, and slashed at the rubble. The flame turned into a sharp sword energy, carrying a burning breath, splitting the rubble into a huge crack. The flying rubble hit the stone wall of the cave, making a crackling sound, and some rubble on the top of the cave also fell down, raising a cloud of dust. In the crack, the giant beast's single eye flashed a scarlet light, like two ghost lights in the dim cave, which was creepy. It let out an angry roar, and the sound waves vibrated the air in the cave. Mark couldn't help but feel a stinging pain in his eardrums. The giant beast suddenly rushed out of the rubble, and black flames burned on its broken body, like a demon from hell. The originally hard scales are now charred, and some have fallen off, revealing the bright red flesh underneath, which makes it even more hideous. Mark jumped back and nimbly avoided the attack of the giant beast. After landing, he quickly adjusted his posture and swung the fire sword at the same time. A flash of fire flashed, leaving a deep wound on the beast. The beast was in pain and let out a deafening roar, full of pain and anger. Black flames spewed out of its mouth, like a black python, with a burning breath, and rushed straight to Mark. Wherever the flames passed, the air became distorted, and the gravel on the ground was burned red.

Seeing this, Albert's face changed, and he immediately injected the remaining energy into the staff. The top of the staff glowed brightly, and a white light curtain appeared in front of Mark, like an indestructible shield, blocking the attack of the black flames. The light curtain collided with the flames, making a harsh sizzling sound, like grease dripping on a red-hot iron plate.

Albert groaned, blood overflowed from the corners of his mouth, and his body involuntarily stepped back a few steps. The light of the staff in his hand dimmed, and it was obvious that the previous attack consumed a lot of energy stored in the staff.

The beast, regardless of its injuries, pounced on Mark again. Its huge body was like a hill, crushing Mark with a strong sense of oppression. It opened its bloody mouth, revealing sharp teeth, as if it wanted to swallow Mark in one bite. "Albert, left!" Mark shouted, dodging to the left. Albert understood and immediately ran to the left side of the beast to attract the beast's attention. The beast was indeed attracted by Albert, and it gave up attacking Mark and chased Albert instead. Albert dodged the beast's attack while looking for an opportunity to attack the beast's eyes again. Mark saw that the beast was attracted by Albert, and immediately seized the opportunity, raised the fire sword again, and chopped it down hard at the beast's head. "Beast, die!" The fire sword chopped the beast's head fiercely with a sharp sound of breaking through the air. This time, the fire sword did not cut the beast's skin as easily as before, but made a dull sound, like metal hitting a rock. Sparks flew, the beast roared in pain, and its huge body staggered. Mark was shocked so much that his palms were numb, but he clenched his teeth and swung the fire sword again, continuously attacking the beast's head.

"Roar--" The beast was in pain and shook its head frantically, trying to shake Mark off. Its huge body hit the stone wall of the cave, and the broken stones fell down. Some stalactites on the top of the cave were shaken off and hit the ground with a dull sound.

Albert was very anxious when he saw Mark in danger. He endured the weakness of his body and raised the staff again, muttering something. A faint white light flashed at the top of the staff, and it was obvious that the energy of the staff was running out. "Hold on, Mark!" Albert gritted his teeth, and a white beam of light shot out from the top of the staff and hit the back of the beast. The beast let out a shrill scream, and the black flames on its back seemed to be suppressed by the white light, and the burning momentum weakened a little.

It turned around angrily, staring at Albert with its scarlet single eye.

Mark took this opportunity to leap high again, and the fire sword wrapped in blazing flames stabbed fiercely at the giant's single eye. "Now!" Mark roared. The tip of the sword accurately pierced the giant's single eye, and the giant let out a deafening scream, and its huge body fell to the ground with a bang, stirring up a cloud of dust.

The cave was dusty and rubble rolled down for a while. Mark fell heavily to the ground, kneeling on one knee, supporting his body with the fire sword, and breathing heavily.

Sweat flowed down his forehead and soaked his hair. He looked up at the giant beast lying on the ground and confirmed that it was completely dead.

Albert staggered to Mark's side, his face pale and his body shaky. The staff in his hand was dim and had lost all its energy. The staff is replenished by the holy stone, which has been broken long ago. It is not easy for the energy of the staff to persist until now.

"Are you okay, Albert?" Mark asked with concern, while reaching out to support Albert.

Albert shook his head and forced a smile, "I'm fine, but the staff is broken." He coughed twice, and a trace of blood flowed out of the corner of his mouth again.