Su Yao stared intently at the colossal mechanical spider beast before her, its metallic aura seeming to freeze the surrounding air. The beast launched the first attack, raising its forelegs high and unleashing high-temperature laser beams from its joints, instantly sweeping towards the group.

Su Yao reacted swiftly, forming hand seals. Her ice-type power coalesced into a thick ice wall in front of her. The laser beam struck the ice wall, sending up a shower of dazzling ice flowers and billowing mist. Her father roared, activating his power shield to its maximum. He charged towards the giant beast like an arrow released from a bow, each step landing with a dull thud. Power surged within his muscles as he swung his arms, slamming the power shield into the beast's legs, attempting to disrupt its attack rhythm.

The mother continued to use her healing powers from the rear, a green light enveloping the wounded team members, their wounds healing at a visible speed. At the same time, she commanded mutated plants to burst forth from the ground, their vines coiling like serpents around the giant beast's body, attempting to restrict its movements.

While fending off the giant beast's attacks, Su Yao unleashed her full mental abilities, probing its internal structure and weaknesses. She discovered a core energy device behind the beast's head, its source of power and its fatal weakness.

"Attack the back of its head!" Su Yao shouted, her ice blades transforming into streaks of cold light as they shot towards the giant beast's weak points.

Upon hearing the command, the teammates adjusted their attack direction, unleashing a barrage of supernatural abilities towards the back of the behemoth's head. However, the behemoth's defenses were extremely robust; its metallic shell could automatically repair damaged parts, and it nimbly swung its long legs, deflecting most of the attacks.

Enraged by the group's attack, the behemoth's eyes flashed an even brighter red light, and a device on its abdomen opened, releasing a swarm of small mechanical flying insects. These insects buzzed and swarmed towards the group like a black cloud. Their mouthparts could fire miniature lasers; although individual ones were not very damaging, their sheer numbers made them difficult to defend against.

Su Yao immediately used her wind-based ability to create a powerful airflow, attempting to disperse the swarm of flying insects. However, the insects remained tightly clustered together, relentlessly closing in on the group. Seeing this, her father stopped attacking the giant beast, turned around, and used a power shield to protect his teammates behind him, swatting down the approaching insects one by one. Her mother increased the output of her healing abilities to ensure that her teammates wouldn't suffer too much injury from the insects' attacks.

In this critical moment, Su Yao calmed down. She focused her mind and fused her ice, fire, and wind abilities together to create a brand new skill—"Ice and Flame Storm Vortex." She waved her hands, and a huge vortex formed in front of her. Ice and fire mingled in the vortex, and the powerful suction pulled the swarm of flying insects into it, instantly shredding them into pieces.

Having dealt with the threat of the flying insects, Su Yao turned her attention back to the giant beast. She took a deep breath, channeling all her supernatural abilities into a longsword formed from her powers. Using the speed of her wind-based abilities, she leaped high into the air, rushing towards the back of the giant beast's head like a bolt of lightning.

The behemoth sensed Su Yao's intention and attempted to block her attack with its long legs. But Su Yao nimbly dodged in the air, her eyes resolute and fearless. In the instant she closed in on the behemoth, she thrust her supernatural sword with all her might towards the behemoth's core energy device.

With a deafening roar, the behemoth's core energy device was struck, its body trembled violently, and the red light in its eyes gradually dimmed. Taking advantage of the opportunity, Su Yao activated her mental abilities, penetrating deep into the behemoth's control system and completely paralyzing its movements.

The colossal beast's massive body crashed to the ground, raising a cloud of dust. Su Yao approached the core crystal within the beast's remains; this crystal contained extremely powerful energy. She carefully collected the crystal, intending to take it back to the base for research.

Exhausted from the fierce battle, Su Yao and the others knew that in this apocalyptic world, only through continuous fighting and exploration could they find a way to save it. They continued their search for clues in the desolate city, hoping to unravel its secrets and bring a glimmer of hope to this world shrouded in darkness.