My low-key cultivation of immortality was discovered by the emperor in my diary.

Chu Lengyu flew high into the sky, coldly watching the Rong cavalry surging in from outside the city.

The enemy's iron hooves thundered as they charged straight towards Zhenbei City, shaking the very earth.

The soldiers of the northern city did not flinch in the face of this overwhelming offensive.

They gripped their longbows tightly, and at a command, two volleys of arrows pierced the sky, raining down like a storm in an attempt to break the enemy's charge.

However, due to a lack of maintenance over a long period of time, these longbows have become weak, the bowstrings have lost their original elasticity, and the arrows are unable to exert their proper range and lethality.

Ultimately, they either fell helplessly into the snow or barely touched the edge of the enemy lines, but failed to inflict any real damage on the enemy.

Upon seeing this, the Rong cavalry erupted in thunderous laughter.

They shouted taunts, "Look at those soldiers on the city walls! They're using such tattered bows and arrows to fight off our Rong cavalry's charge? What a joke! Do they think they can stop our advance? How naive!"

Hearing these harsh jeers, the soldiers felt humiliated and angry, but they did not retaliate. Instead, they gripped their bows and arrows even tighter, preparing for the next round of shooting.

Er Lengzi stood behind the arrow stacks, a determined glint in his eyes. He knew his archery skills were good, and even with his old bow and arrows, he was confident he could teach the enemy a lesson.

When the Rong cavalry came within range, Er Lengzi took a deep breath, calmed himself, and drew the bowstring taut.

After carefully aiming, he gently released his finger, and the arrow shot out swiftly, hurtling towards its target with a whooshing sound.

However, in the wind and snow, the arrow's force was ultimately insufficient; it did not hit the enemy's head, but instead accurately knocked off the cavalryman's felt hat.

This sudden turn of events stunned everyone present, even the cavalryman himself, who froze on the spot, his arrogant demeanor instantly freezing.

But he immediately felt insulted and angry, stopped his horse, pointed at the city wall and roared: "That soldier who shot the arrow, I'll take your life!"

Despite the threat of the cavalry, Er Lengzi showed no fear whatsoever.

Er Lengzi was not afraid. He sneered and nocked another arrow, responding provocatively, "Come on, let's see if your horse is faster or my arrow is faster!"

The Rong cavalryman was thoroughly enraged. He brandished his scimitar, let out a deafening roar, and then kicked his horse's belly, charging fiercely towards the city wall.

Chu Lengyu looked indifferently at the Rong army below and made a hand seal.

"Go!" she shouted softly, releasing the power in her hands.

Countless dazzling lightsabers slashed through the sky, raining down on the enemy like a storm.

The lightsaber was extremely fast; it shot into the enemy ranks almost the instant it appeared.

With a series of sharp cracking sounds, the lightsaber pierced through the armor of the Rong cavalry, sending up horrifying sprays of blood.

The cavalry in the front ranks fell like wheat being harvested, while the cavalry in the back ranks were struck by lightsabers before they could even react.

The Rong soldiers were filled with endless panic as they looked at the tragic state of their comrades.

They didn't know what kind of power this was, nor how to resist it. They could only stare blankly as the arrow of light pierced through everything and took away lives.

In an instant, screams and neighing of horses filled the battlefield.

Those Rong cavalrymen who were just moments ago so arrogant and domineering were now fleeing in all directions like stray dogs.

Their charging formation was completely disrupted, and their originally fierce offensive was so vulnerable in the face of Chu Lengyu's magic.

Faced with the sudden disaster, their arrogance was instantly replaced by fear and despair.

The Rong cavalry looked up in alarm, trying to find the source of the lightsaber, but to no avail.

"Have the gods been angered? Why must we suffer such punishment!" A Rong warrior's voice trembled with tears.

He watched helplessly as his companion was struck by a lightsaber, split in two, blood splattering everywhere, before falling from his horse in a gruesome manner.

"No, this isn't the wrath of the gods, it's the enemy's sorcery!" another cavalryman roared in despair. "This can't be real! Which sorcerer is plotting against us?"

He wildly swung his scimitar, not knowing where to strike, and could only blindly vent his fear.

The remaining enemies were terrified at the sight. They had never seen such a powerful and mysterious force before. Fear quickly spread through their hearts, causing their courage and fighting spirit to crumble instantly.

They began to waver, to hesitate, and some even turned their horses around, preparing to flee.

Chu Lengyu did not stop. She waved her hand again, and another wave of lightsabers shot out. This time, the lightsabers were even more powerful than before, exploding directly in the enemy army and causing screams of agony.

"Run! Run!" Someone shouted the first cry, and the Rong cavalrymen began to scatter and flee.

Many people even discarded their weapons, wanting only to escape this land of death as quickly as possible.

They rushed forward as if countless evil spirits were chasing them.

Some people even pushed and trampled each other in a struggle for escape routes, completely disregarding their former camaraderie.

At this point, the morale and formation of the Rong army had completely collapsed.

Immediately afterwards, Chu Lengyu made her move again, this time summoning a sky full of rockets.

These rockets streaked across the sky like meteors and landed on the Rong soldiers.

The Rong soldiers rolled frantically in the snow, trying to extinguish the flames on their bodies.

However, these flames were exceptionally fierce, clinging tightly to their bodies and relentlessly devouring their lives.

"Ah! This fire... this fire won't go out!" a Rong soldier screamed in despair.

He patted the flames off his body and rolled around in the snow, but the next moment, his body was completely engulfed in flames, his skin was charred black, and he emitted a nauseating smell.

The other soldiers were terrified when they saw his miserable state.

They scattered and fled, but the rockets seemed to have eyes, following closely behind and hitting them one by one.

Every glimmer of firelight casts a shadow of death.

The Rong army was thrown into chaos and completely collapsed. In the end, only a very small number of people fled at the first sign of trouble and managed to survive.

However, no matter how far they fled, they could not erase the terrifying shadow that the disaster had left in their hearts.

High in the sky, Chu Lengyu calmly looked down at everything below, her eyes showing no ripples and no trace of pity.

This is war!