I only reached the Foundation Establishment stage at eighty years old, and then the system appeared.

"Master, now that our legion is so powerful, should we consider launching another attack on the territories of the zombies and the Nether Beasts?" Youying stood beside Yang Hongbo, his eyes flashing with burning fighting spirit, and asked respectfully.

Yang Hongbo nodded slightly, his gaze lingering on the distance, as if piercing through layers of mist to see the unknown battlefield. "It's time. Zombies and Nether Beasts have roamed the Netherworld for a long time; their territory is vast and rich in resources. If we can conquer them, our power will surely rise to a new level, making us the most powerful force in the Netherworld."

Dark Blade stepped forward, his voice low and firm, and said, "Master, we are willing to be the vanguard, to flatten the territory of the zombies and the Nether Beasts and clear away all obstacles for you."

Yang Hongbo smiled, a smile that exuded undeniable authority and confidence. "I have never doubted your loyalty and courage. However, zombies and Nether Beasts are not easy opponents."

"Zombies are tough, strong, and impervious to pain; while the Nether Beasts come in various forms and possess all sorts of strange abilities. We cannot be careless and must devise a meticulous plan."

Shadow and Dark Blade exchanged a glance. Shadow said, "Master is wise. So, what should we do?"

Yang Hongbo pondered for a moment, then slowly said, "Shadow, you lead a group of skeleton knights and skeleton kings to scout the zombie territory and understand their troop deployment and defenses. Dark Blade, you lead the skeleton cavalry and skeleton king to explore the Nether Beasts' territory and see what weaknesses they have."

"Yes, Master!" Shadow and Dark Blade responded in unison, then quickly went to carry out the order.

More than ten days later, Shadow and Dark Blade returned one after the other.

Shadow knelt on one knee and said, "Master, I have scouted out the zombies' territory. They are mainly distributed in the Dark Swamp area, where the terrain is complex and swampy. The zombies have used the terrain to their advantage to set up many traps and fortifications. Their forces number in the millions, including many high-level zombies and several powerful zombie lords."

Dark Blade stepped forward and said, "Master, the territory of the Nether Beasts is in the Nether Mountains. There are towering peaks and deep valleys there, and the Nether Beasts live scattered in various valleys and caves."

"They come in many varieties; some excel at flying, some at stealth, and others possess powerful magical attacks. However, I've noticed that the zombies and the Nether Beasts don't seem to be united, each acting independently. This might be our opportunity."

Upon hearing this, a glint of light flashed in Yang Hongbo's eyes. "Very good, Shadow and Dark Blade, you've done a great job. Based on your report, I've decided to launch an attack on the zombie territory first."

"Although the terrain is advantageous to the zombies, their fortifications are not insurmountable by our magic and cavalry charges. Moreover, their disunity gives us an opportunity."

Soon after, Yang Hongbo led his skeleton army to the Dark Swamp. The swamp was filled with black mist and emitted a pungent odor that made people want to vomit.

The zombies had already learned of their arrival and emerged from the swamp, letting out a series of howls that sounded like the hooting of owls, sending chills down one's spine.

"Yang Hongbo, you stupid wretch, how dare you invade our territory!" A tall, ferocious-looking zombie lord roared, his voice echoing like muffled thunder across the swamp.

Yang Hongbo, riding a massive skeletal warhorse, coldly stared at his opponent and said, "You zombies have committed countless evils in the underworld, oppressing the weak. Today, I've come to annihilate you!"

"Hahaha, Yang Hongbo, the underworld is a place where the strong prey on the weak. Don't try to disgust people under the guise of saving the world."

Yang Hongbo ignored it and gave instructions to his two subordinates.

"Shadow, you will lead the Skeleton Knights and Skeleton King as the main force for the frontal attack, drawing the zombies' attention."

"Darkblade, you lead the skeleton cavalry and skeleton king to circle around to their rear, cut off their retreat, and attack their command system at the same time."

"I will lead the skeleton mages and skeleton archers to provide magical and arrow support from the flanks."

"Yes, Master!" Shadow and Dark Blade responded in unison again and went down to prepare for the attack.

"Master, we are ready!" The shadowy voice echoed over the swamp filled with the stench of decay, and the skeletal warhorse beneath him pounded its hooves uneasily, splashing black mud.

Yang Hongbo nodded slightly, his gaze sweeping over the ghostly skeleton warriors under his command. Bloodthirsty flames flickered in their empty eye sockets, and the weapons in their hands gleamed with a cold light. "Alright, attack! Let these zombies see the might of our skeleton army!"

With Yang Hongbo's command, Shadow led the Skeleton Knights and Skeleton King like an iron torrent charging towards the zombie army.

The sound of horses' hooves made the swamp mud tremble slightly, and the lances in the hands of the skeleton knights gleamed coldly as they thrust straight at the decaying bodies of the zombies.

"Kill!" Shadow roared, charging into the horde of zombies. His blade flashed like lightning, instantly cleaving a zombie's head in two, splattering white brain matter all over him, but he felt nothing, continuing to swing his weapon and hacking down the surrounding zombies one by one.

The zombies were not to be outdone. They roared deafeningly, waving their thick arms as they charged at the skeleton knights.

A tall zombie grabbed the reins of a skeleton knight's horse, pulled hard, and dragged both the horse and the knight to the ground. Then it opened its blood-red maw and bit down on the knight's head.

"Hmph, courting death!" With lightning speed, Shadow stabbed the zombie in the eye. The zombie cried out in pain and loosened its grip on the reins. Shadow seized the opportunity and slashed off its head.

While Shadow led the main force in a fierce battle against the zombies, Darkblade, along with the skeleton cavalry and the Skeleton King, quietly circled around to the rear of the zombie army. They moved through the darkness like ghosts, making no sound whatsoever.

"Look, that's the zombie command system!" Dark Blade pointed to a high platform made of zombie corpses in front of him, where several zombie lords stood, waving their arms and directing the zombie army into battle.

"Skeleton cavalry, charge! Skeleton King, follow me and slay those lords!" With a command from Darkblade, the skeleton cavalry charged toward the high platform like arrows released from a bow, the sound of hooves breaking the silence of the night.

The zombie lords sensed the danger behind them and turned around, roaring angrily. "Stop them!" one of the zombie lords shouted.

A horde of zombies charged at Darkblade and his men, but they showed no fear. The Skeleton Kings wielded their massive weapons, smashing the zombies away one by one, while the Skeleton Cavalry thrust their spears at the zombies' vital points.

"Die!" Dark Blade flashed and appeared in front of a zombie lord. The dagger in his hand was like a venomous snake, stabbing towards the lord's throat.

The zombie lord reacted extremely quickly. It dodged Dark Blade's attack by sidestepping, then grabbed Dark Blade's arm and flung him away with a forceful jerk.

Dark Blade flipped in mid-air and landed steadily on the ground. "Hmph, you've got some skill, but it's not enough!" He charged at the zombie lord again, engaging it in fierce close combat.

Meanwhile, on the flank of the battlefield, Yang Hongbo led skeleton mages and skeleton archers, continuously unleashing spells and arrows.

The skeleton mages chanted incantations, and beams of black magic shot towards the zombie horde like meteors, felling the zombies wherever they went.

The skeleton archers stood at a distance, constantly drawing their bows and firing arrows, raining down arrows that the zombies couldn't defend against.

"Yang Hongbo, do you think you can defeat us like this?" The tall, ferocious-looking zombie lord roared angrily at Yang Hongbo as he saw his troops suffer heavy casualties.

Yang Hongbo sneered, "Hmph, you zombies are doomed to defeat today! But I'd like to see just how capable you, this so-called lord, really are." With that, he rode his skeletal warhorse toward the zombie lord.

The zombie lord, not to be outdone, roared and charged at Yang Hongbo. The moment they met, Yang Hongbo's longsword clashed with the zombie lord's claws, producing a crisp sound.

"Your strength is nothing special!" Yang Hongbo mocked, while increasing the force in his hand, forcing the zombie lord to retreat repeatedly.

Enraged, the zombie lord suddenly opened its mouth and spewed out a cloud of black poisonous mist. Yang Hongbo, anticipating this, swiftly dodged to the side, avoiding the attack. Then, taking advantage of the zombie lord's brief pause after spewing the mist, he launched a fierce attack.

"Mental Sprint!" Yang Hongbo shouted, and an invisible mental force shot towards the Zombie Lord's brain like a sharp arrow. The Zombie Lord felt a sharp pain in his head, his vision went black, and he almost fell to the ground.

"Now!" Seeing the Zombie Lord injured, Shadow and Darkblade immediately seized the opportunity and charged towards it. Shadow's blade gleamed coldly as he thrust it towards the Zombie Lord's chest; Darkblade, on the other hand, attacked from the side, his dagger aimed straight for the Zombie Lord's neck.

Despite its injuries, the Zombie Lord reacted with lightning speed. Ignoring the pain in its head, it sidestepped the Shadow's attack and then blocked Dark Blade's dagger with its arm. However, the attacks from the Shadow and Dark Blade were too fierce, and the Zombie Lord gradually found itself struggling to cope.

"Give it your all!" Yang Hongbo shouted from the side, while continuing to release his mental power to interfere with the zombie lord's brain.

Shadow and Darkblade exchanged a glance and nodded. They launched their strongest attack simultaneously. Shadow's blade drew a graceful arc, slashing towards the Zombie Lord's head; Darkblade's dagger, like lightning, pierced towards the Zombie Lord's heart.

The zombie lord tried to dodge, but it was too late. The shadow's blade struck its head, cutting only halfway in, but it severely hampered its movement.

"No!" The zombie lord let out a desperate roar, then slowly collapsed to the ground.

With the Zombie Lord's fall, the zombie army was thrown into chaos. Shadow and Darkblade seized the opportunity to lead the skeleton warriors in a final charge, slaughtering the remaining zombies one by one.

The battle lasted three days and three nights. The dark swamp reeked of blood, and was littered with the corpses of zombies and skeletons. But the skeleton army, with its tenacious fighting spirit and Yang Hongbo's brilliant command, ultimately triumphed.

"Master, we've won!" Shadow and Dark Blade approached Yang Hongbo, excitedly exclaiming. Their bodies were covered in black blood, but their eyes were filled with pride and joy.

Yang Hongbo looked at the battlefield before him and nodded slightly. "Very good, you all did an excellent job. However, we cannot be complacent. There are still the territories of the Nether Beasts waiting for us to conquer."

"Yes, Master! We are willing to follow you and conquer the entire Underworld!" Shadow and Dark Blade said in unison, their voices echoing above the Dark Swamp, filled with determination and resolve.

Yang Hongbo smiled, then mounted his skeletal warhorse and led his skeleton army on a new journey.