The male protagonist of the book is poisonous

We were as frightened as if we were facing a formidable enemy, our eyes fixed fixed on the pitch-black water monster. The monster lingered near the spring, its red eyes fixed fiercely on us, filled with defiance and anger, as if we were intruders on its territory, determined to expel us.

I took a deep breath and launched the attack. I slowly channeled the power of the elemental crystal into the divine sword. Instantly, the sword shone brightly, a radiant silver light like the breaking light of dawn, streaking towards the water monster. The monster, however, was incredibly agile, twisting its massive body in an incredible manner, effortlessly dodging my fierce blow. Then, it lashed out with its massive claws, sending a torrent of black water cascading down upon us like a black curtain.

At this crucial moment, Brother Lingxiao flashed to my side like a flash of lightning, his eyes filled with concern and determination. He stood shoulder to shoulder with me, facing the monster's attack together. His sword, like a swift dragon, instantly slashed with dazzling patterns. These patterns, like a solid shield, completely blocked the black water spray. Meanwhile, behind us, the elves chanted ancient and mysterious spells in unison. The sound was ethereal and melodious, like a call from an ancient time. As the spells were chanted, beams of magical light shot towards the monster like sharp arrows. These beams were a riot of color. The green was healing magic, gently surrounding us like a spring breeze, replenishing the damage we'd sustained in battle. The blue was freezing magic, like a cold winter frost, slowing the monster's agility. The gold was strength-boosting magic, shining down on us like brilliant sunlight, making our attacks even more powerful.

The Guardian of Light wore a solemn expression, his hands clasped together, and he chanted a sacred spell of light. As he chanted, a massive white wall of light rose up before us. Like a sturdy fortress, it blocked the monster's subsequent tidal attacks.

Seeing its attack so easily blocked, the water monster let out a deafening roar. The roar echoed throughout the cave, shaking the very walls. Then, its body began to swell like an inflated ball. Its already massive form grew even larger. Its black scales, like impenetrable armor, gleamed with an evil sheen in the reflection of the spring's ripples. Each scale seemed to speak of its power and terror.

"It's about to launch a more powerful attack!" I shouted nervously, with a barely perceptible tremor in my voice.

The water monster slowly opened its bloody maw, and a black ball of energy began to gather within. Like a miniature black hole, the ball of energy spun continuously, emitting a sickening dark aura. As the ball of energy continued to grow, the surrounding air seemed to be warped and distorted by its immense power, and light began to bend around it.

"Everyone, be careful. The power of that energy ball cannot be underestimated." The Guardian of Light warned solemnly.

Just as the monster was about to unleash its energy ball, Brother Lingxiao and I exchanged glances, each seeing steely determination in the other's eyes. We simultaneously charged toward the monster, like two fearless cheetahs descending upon their prey. The artifact sword and Brother Lingxiao's sword slashed through the air in dazzling arcs, piercing the monster's head together. Our sudden attack caught the monster completely off guard, completely disrupting its intended energy ball launch. The ball veered off course, shooting toward the cave's ceiling.

The energy ball struck the cave's ceiling, sending a violent tremor like a surging earthquake wave. Crystals on the ceiling began to crumble, then rained down. Seeing this, the elves hurriedly cast their spells. Their wands swung forth a brilliant beam of light, which quickly expanded into a vast protective shield, like a transparent dome, tightly enveloping us and preventing the crystals from falling on us.

Seeing that its attack not only failed to injure us but was actually neutralized, putting it in a passive position, the water monster became furious. Its massive tail, like a thick black python, swept towards us. The force of this sweep was so immense that it ripped the air apart wherever it passed, emitting a sharp whistling sound like the Grim Reaper wielding his scythe. We quickly jumped to avoid it, but the turbulence caused by its tail still hit us, and we fell backwards like two fragile leaves in the wind.

I struggled to my feet, ignoring the pain, and once again grasped the artifact sword as I charged towards the water monster. As I rushed towards the monster, an idea suddenly struck me: the unique reaction between the elemental crystal and the spring water. Perhaps this would be the key to defeating the water monster. As I charged towards the monster, I shouted to the elves, "Elves, use magic to channel the power of the elemental crystal into the spring water."

The elves immediately understood. With deft magic, they slowly suspended the elemental crystal above the spring. Then, concentrating their energy, they channeled the crystal's power into the spring water like a gentle trickle. Infused with the crystal's power, the water began to churn violently, like boiling water. A white light emanated continuously from the spring, growing stronger and stronger until it illuminated the entire area around the spring as bright as day.

The water monster seemed to sense the approaching danger, a flicker of panic in its red eyes. Desperately, it rushed towards the elves, attempting to stop them. But how could Brother Lingxiao and the Guardian of Light allow it to succeed? Brother Lingxiao stepped forward, his eyes filled with not only determination but also deep affection for me. He looked at me, saying gently yet firmly, "My dear, go ahead and do what you wish. I will protect everyone, and you too." With that, the sword in his hand danced even more impenetrably, like a silver vortex, each strike imbued with his love for me and his desire for victory. The Guardian of Light, not to be outdone, unleashed a relentless barrage of attacks from his light, like the blazing sun.

As the power of the elemental crystals continued to flow into the spring, its white glow grew ever stronger. Like a holy flame, it seemed to burn away all darkness. I seized the perfect moment, gripping the divine sword with both hands, raising it high, and thrusting it forcefully into the spring. The moment the divine sword and the spring water met, the spring's white light seemed to have found an outlet, surging along the sword toward the water monster. Carrying the powerful white light of the spring water, the divine sword pierced the water monster like a holy sword of judgment.

The water monster, pierced by the divine sword, let out a painful wail. The wail echoed through the cave, like the final struggle of the forces of darkness. White light surged through its body like a raging torrent, rapidly spreading and engaging the dark forces within it in a fierce, life-or-death struggle. The water monster began to struggle frantically, its body like a giant python engulfed in flames, twisting and turning, trying to break free from the divine sword's restraints. However, the divine sword, like a towering tree rooted in its flesh, remained firmly embedded, and the white light continued to erode its dark power.

Under the powerful purifying force of the white light, the monster's body gradually shrank, and its once hard black scales began to fall off piece by piece, like withering leaves. The anger and ferocity in its red eyes were slowly replaced by fear, which overwhelmed it like a tide.

Finally, the monster's body completely dissipated, leaving only a cloud of black smoke. Under the illumination of the white light, the black smoke gradually dissipated, like ice and snow encountering the warm sun, and peace finally returned to the cave.

"We succeeded!" I cheered excitedly, tears of excitement flashing in my eyes.

With reverence and gratitude, we gently placed the elemental crystal, eroded by darkness, into the pure spring. As soon as the crystal touched the water, it slowly regained its original purity, like a long-sleeping baby awakened. It began to emit a brilliant, multicolored light, which rippled through the spring like a rainbow, illuminating the entire spring with a dreamlike brilliance.

"Now, we can take this purified crystal and save the world," Ling Xiao said hopefully, his eyes filled with longing for the future and love for me. He walked over to me and gently took my hand. Together, we gazed at the radiant crystal, as if witnessing a beautiful vision of a world shrouded in darkness being filled with light again.

We left the mountain with excitement and a sense of mission, embarking on a new journey. It was a road full of hope and challenges, but our hearts were filled with strength because we had love, faith, and the purifying crystal that could dispel darkness.