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

In fact, there are still immortals in the Demon Sect who do not cultivate demonic arts, but these immortals have lost their minds and can only cultivate mechanically under the command of the Demon Continent.

These immortals are the "meat" raised by the demons. Because they have lost their minds, even if the demons provide them with cultivation resources, they can only cultivate to the Golden Immortal Realm or the Great Luo Golden Immortal Realm at most.

For example, when the immortal army conquered a demon sect, they found some immortals imprisoned in a corner of the dungeon. Their eyes were vacant and they had no consciousness.

"Sect Master, look at these immortals, what's wrong with them?" Yang Hongbo asked, frowning.

The sect leader stepped forward, observed them carefully, and his expression became very solemn: "Clan Chief Yang, these immortals should be 'carnivores' raised by the demons. The demons used special methods to deprive them of their minds, making them only able to cultivate mechanically. They provide them with cultivation resources, but the lack of minds limits their growth, and they can only reach the Golden Immortal Realm or the Great Luo Golden Immortal Realm at most."

Yang Hongbo clenched his fists in anger: "These demons are utterly depraved! How could they treat our own people like this!"

At this moment, a Yang family disciple rushed over and said, "Clan leader, we have discovered some low-level demons devouring these tamed immortals deep within the sect."

Yang Hongbo and the sect leader exchanged a glance and immediately followed the disciple to investigate. They saw a group of low-level demons huddled together, frantically devouring the flesh and blood of the immortals. Demonic energy surged from their bodies, and their auras continued to rise.

"Stop! You disgusting demons!" Yang Hongbo roared, unleashing a powerful burst of immortal energy towards the low-level demons.

The low-level demons were startled by the sudden attack and stopped what they were doing, watching Yang Hongbo and his group warily. One of the low-level demons stepped forward and sneered, "Hmph, you immortals have come to die again? But you've come at the right time; we need pure flesh and blood to improve our strength."

Yang Hongbo sneered, "You low-level demons? You're practically courting death!"

With that, Yang Hongbo flashed and instantly appeared in front of the low-level demon, throwing a punch. Before the low-level demon could react, he was pulverized by Yang Hongbo's punch.

Seeing this, the other lower-level demons roared and charged towards Yang Hongbo. Yang Hongbo remained calm, forming hand seals and unleashing a barrage of immortal techniques towards the demons. In an instant, light flashed, screams filled the air, and the lower-level demons fell one after another.

However, at that moment, several of the low-level demons who had devoured the flesh and blood of the immortals suddenly unleashed powerful auras and broke through to the Immortal King realm.

"Haha, you immortals, you didn't expect this, did you? We devoured the flesh and blood of these immortals and our strength has greatly increased!" A demon who had broken through to the Immortal King realm laughed triumphantly.

Yang Hongbo frowned and said, "Do you think you can do whatever you want just because you've broken through to the Immortal King Realm? Today, none of you will escape!"

Just then, the sect leader said, "Clan Chief Yang, these demons who have broken through to the Immortal King realm are not very talented. In the demon race, those with poor talent like them are often devoured by the Demon Emperor to enhance their strength. And when the Demon Emperor reaches the peak of the Demon Emperor realm, they will gather and go to the Immortal Continent to devour pure flesh and blood in order to ascend to the God Realm."

Upon hearing this, Yang Hongbo's expression grew even more grim: "So that's how it is. These demons are truly ruthless, resorting to any means to increase their strength. We must completely annihilate these demons today and prevent them from harming the Immortal Continent again."

After saying that, Yang Hongbo, the sect leader, and a group of powerful immortals all took action and annihilated these disgusting demons.

Looking at the demon corpses scattered on the ground, Yang Hongbo said, "Sect Master, we cannot let our guard down. The demons' ambitions will not be extinguished. We must accelerate our counterattack and drive the demons out of our world completely."

The sect leader nodded and said, "Clan Chief Yang is right. Let's continue forward and let the demons know that our immortal race is not something they can invade at will!"

As the immortal army advanced across the demon continent, more and more demon sects were conquered, and the imprisoned "carnivorous" immortals were rescued one after another. However, none of the demon sects on the demon continent were sitting idly by and waiting for their doom.

In a dark and gloomy demonic hall, a group of high-ranking demons were having an urgent meeting.

"Hmph, this immortal army is truly despicable, daring to rampage so rampantly on our territory!" A demon emperor roared angrily, his body radiating powerful demonic energy that made the surrounding low-level demons tremble in fear.

Another Demon Emperor coldly said, "They think they can easily defeat our demon race like this? They're delusional. The combined power of so many demon sects on our demon continent is beyond their imagination."

"That's right, we must gather a large army to resist the attack of the immortal army. Those immortals are nothing but self-righteous scoundrels. They think they are so noble, but they are just a bunch of hypocrites," a demon emperor chimed in.

At this moment, a demon scout rushed into the main hall, knelt on one knee, and said, "Reporting to all lords, a celestial army is slaughtering the demon cubs on our demon continent. Wherever they go, our demon sects are conquered and suffer heavy losses."

"What? This immortal army is so arrogant!" The enraged demon slammed his fist on the table, which instantly turned to dust.

"Pass on my order! Immediately summon all the demonic forces! We must fight this immortal army to the death!" the Demon Emperor roared.

Soon, many demon sects on the Demon Continent received the order and began to assemble their armies. In an instant, demonic energy surged across the Demon Continent, and countless demon warriors gathered together, forming a massive demon army.

Meanwhile, on the side of the immortal army, Yang Hongbo and Master Shi also noticed the movements of the demon race.

"Sect Master, I sense that the demonic energy on the Demon Continent is much denser than before. It seems they have begun to amass a large army and are preparing to resist our attack," Yang Hongbo said with a frown.

The sect leader nodded and said, "Clan Chief Yang, this is exactly what we've been hoping for. Our mission in this incursion into the Demon Continent is to completely annihilate the Demons. Since they've amassed a large army, let's engage them in a direct battle and show them the might of our Immortal Clan."

"Alright! Let us fight this demon army to the death and avenge our compatriots who have been harmed by them!" Yang Hongbo said with great enthusiasm.

Soon after, the armies of the immortals and the demons met on a vast plain. The two armies arrayed themselves in battle formation, and the atmosphere became extremely tense.

From within the demon army, a demon emperor slowly emerged. He looked at the immortal army and sneered, "Hmph, you immortals are truly audacious, daring to run wild on our demon continent. Today, not one of you will leave alive!"

Yang Hongbo, equally defiant, declared from the flagship: "You demons, you filthy creatures, living in this world is a waste of resources. You've resorted to any means to increase your strength, harming our compatriots. Today, we will avenge them and annihilate you completely!"

"You? What a joke! There are many demon sects on our Demon Continent, and our armies are incredibly powerful. Your Immortal Clan is nothing but a rabble." The Demon Emperor said disdainfully.

"Whether they're a rabble or not, we'll only know after the battle!" Yang Hongbo shouted, "Attack!" Instantly, a beam of light filled with destructive energy appeared in front of the Demon Emperor, blasting him into ashes.

Enraged by the sudden killing of one of their leaders, the demons charged towards the immortal army, while all the immortal warships and spaceships simultaneously vanished into the void.

In an instant, as the demons on the battlefield were killed, their mournful screams mingled with the clash of celestial and magical arts, creating a gruesome scene.

Yang Hongbo looked down at the miserable demons below. Although the warships and airships were killing the demons quickly, the number of demons was too great.

Therefore, Yang Hongbo said to the sect leader, "Sect leader, there are too many demons. We need to think of a way to wipe them out in one fell swoop."

The sect leader nodded and said, "Clan Chief Yang, I have come up with a plan. Some members of our immortal army are skilled in trapping formations. We can have them set up a powerful immortal formation to trap the demon army, and then we can concentrate our forces to attack their core strength."

"Great idea! Let's do it that way!" Yang Hongbo said.

Immediately, the sect leader ordered the immortal disciples skilled in formations to begin setting up an array. In no time, a massive immortal array was completed. This array emitted a powerful light, trapping most of the demon army within.

"Charge! Break this immortal formation!" The Demon Emperor shouted upon seeing this.

However, no matter how the demon army attacked, they could not break the immortal formation. Taking advantage of this opportunity, the immortal army concentrated its forces to attack the core of the demon army. In an instant, the demon army was thrown into chaos.

"Damn it! You immortals, how could you resort to such methods!" the Demon Emperor roared in fury.

"Hmph, no method is too much to deal with you demons!" Yang Hongbo sneered.

After a fierce battle, the celestial army finally emerged victorious. The demon army was routed, and those demons trapped in the celestial formation were wiped out one by one.

"We have won! We have defeated the demon army!" A cheer erupted from the immortal army.

Looking at the demon corpses scattered on the ground, Yang Hongbo said, "Sect Master, this is only the first step in our counterattack against the demons. We must continue to advance, completely drive the demons out of our world, and restore peace and tranquility to the Immortal Continent."

The sect leader nodded and said, "Clan Chief Yang is right. Let's continue forward and let the demons know that the immortals' resolve is unwavering!"

Thus, the immortal army continued its advance across the demon continent, their figures like sharp blades, gradually cutting through the darkness of the demon realm, marching ever closer towards final victory.