Upon returning to the Alliance base, Su Yao immediately relayed the information she had obtained from the "Shadow Order" to everyone, plunging the entire Alliance into a tense atmosphere. Su Yao knew that they had to quickly unravel the secrets of the Dark Crystal Core in order to find a way to deal with the "Shadow Order."

With Su Yao's assistance, the research team worked day and night to study the dark crystal core. Finally, they discovered that the core contained a special energy frequency capable of interfering with the central nervous system of living beings, thereby controlling zombies. To break this control, they needed to find a counteracting energy source, which was likely related to the previously discovered seven-colored crystal core.

Just as the Alliance was busily preparing countermeasures, the Shadow Order launched another attack. This time, they dispatched an even more powerful zombie army and a group of elite superhumans, heading straight for the Alliance base.

Su Yao stood on the base's city wall, gazing at the overwhelming enemy forces, her eyes resolute and calm. She turned to her parents beside her and said, "Mom and Dad, this battle concerns the life and death of the alliance. We cannot back down."

Mom and Dad nodded, their eyes equally resolute. As the enemy drew near, Su Yao struck first. Her hands moved swiftly, fusing her ice and wind powers, unleashing a howling ice storm that swept towards the zombie horde. The powerful storm swirled the zombies, sending them colliding in mid-air, many instantly torn to shreds.

Father also unleashed his advanced earth-based abilities. With a roar, the ground trembled violently, and massive earth spikes erupted from the ground, piercing through the zombies' bodies like sharp blades. Mother, behind them, focused all her energy on healing, casting shields on the Alliance warriors on the city walls to protect them from enemy ranged attacks.

However, the elite ability users of the "Shadow Order" were no pushovers either. They broke through Su Yao's ability attacks and flew towards the city wall. These ability users possessed various unique abilities; some could control fire, some could release poisonous mist, and others could become invisible and launch surprise attacks.

Su Yao immediately switched to her space-time ability, her figure flickering across the city wall, appearing precisely in the enemy's attack path and using her spatial shield to block one deadly attack after another. At the same time, she used her mental ability to interfere with the enemy's ability execution, causing their attacks to deviate.

During the battle, Su Yao discovered a weakness in the "Shadow Order" superhumans: when they unleashed their powerful abilities, there were brief gaps in energy fluctuations. She seized the opportunity, condensing her "Space-Time Flame Blast" and precisely blasting it towards the enemy's weak point. After several loud explosions, several elite superhumans from the "Shadow Order" were blasted down from the city walls.

But the Shadow Order did not back down. They intensified their control over the zombie horde, and more zombies surged in like a tidal wave. Several enormous zombie beasts even appeared on the battlefield. These beasts were as large as mountains, and every step they took could cause earthquakes. Their attacks were incredibly powerful, easily destroying the Alliance base's defenses.

Seeing this, Su Yao's father took a deep breath and unleashed his earth-based powers to their fullest extent. He plunged his hands into the ground, drawing upon the power deep within the earth to erect a towering earthen mound in front of the base. This mound blocked the zombie behemoth's path, buying the alliance precious time.

Meanwhile, the mother tirelessly traversed the city, using her healing abilities to treat wounded soldiers. As her healing powers were gradually depleted, they underwent a transformation. What was once a single-target healer could now release healing energy over a wider area, significantly increasing the efficiency of her treatments.

Taking advantage of this break, Su Yao delved deeper into the energy relationship between the seven-colored crystal core and the dark crystal core. She conducted simulation experiments within the system space and finally discovered a method to use the energy of the seven-colored crystal core to neutralize the control exerted by the dark crystal core.

Su Yao arrived at the front lines of the battlefield with the Seven-Colored Crystal Core. She released its energy, forming a dazzling energy halo. As the halo spread into the zombie horde, the controlled zombies gradually regained consciousness, ceased their attacks, and collapsed to the ground.

Seeing their control fail, the Shadow Order fell into disarray. Taking advantage of this, Su Yao launched a full-scale attack, leading the alliance's superhumans into the fray. In the fierce battle, Su Yao and her family displayed formidable fighting prowess, defeating the Shadow Order's enemies one by one.

After this arduous and protracted battle, the Alliance successfully defended the base. Su Yao knew that this was only the beginning of the struggle against the "Shadow Order." They would surely return, and the next attack might be even more ferocious.

Therefore, Su Yao decided to launch a large-scale supernatural ability training program within the Alliance base. She shared her supernatural ability training experiences with the Alliance warriors and used crystal core resources to help them improve their ability levels. In addition, Su Yao collaborated with a research team to study how to convert crystal core energy into more powerful weapons and equipment to enhance the overall strength of the Alliance.

In this post-apocalyptic world filled with crisis and challenges, Su Yao and the alliance will continue to persevere, constantly exploring the mysteries of the crystal core, enhancing their own strength, and striving to protect humanity's last hope.