"Traitor, your thoughts are as foolish as your brain. What gives you such confidence to appear before me?" Guilliman said to the leader of the traitors.
"You could have retreated back to that disgusting warp before I arrived, but you didn't. I must admire your courage, and I also suspect that in the long years, your brain has completely deteriorated, after all, there aren't many good parts left on you."
"You are very arrogant, Primarch."
Gurlak's face darkened.
It had never occurred to him that a Primarch could say such things.
"If you were facing a group of trash, you would also be involuntarily arrogant. If your enemies can't change their miserable fate no matter what they do, then what reason is there not to be arrogant?"
Guilliman's tone was full of mockery, and his voice echoed throughout the battlefield, causing the soldiers of the Imperium to cheer.
"You... you will pay the price, Primarch."
Gurlak's sickly green face turned a deep, dark green. It was clear that Guilliman's words had infuriated him.
Anyone who hears themselves called trash will inevitably become enraged, even if the other party is a Primarch.
"I also hope you have the ability to make me pay the price, but unfortunately, you don't."
As soon as Guilliman spoke, Gurlak was speechless.
He had never seen such an arrogant Primarch.
Guilliman was completely indifferent to Gurlak's rage. The soul within him was not merely that of the Thirteenth lord Primarch from the past; it had also merged with the knowledge and memories of another soul. The combination of the two had formed a brand new Guilliman, with a brand new personality.
When it came to mocking people, not even the Chaos Gods were his match.
"I hope your strength is as strong as your mouth, Primarch."
Gurlak looked at his subordinate. The bloated head encased in a helmet nodded, indicating that everything was ready.
"You will face the power of the warp! Tremble before it!" Gurlak roared loudly.
The ground inexplicably began to shake.
The sound of shattering glass filled the air.
Streams of unholy light surged from the crack, carrying the most extreme malice. Everyone could feel the will that utterly detested everything in the real world trying to break through the restrictions and enter reality.
Crack, crack.
Real space shattered like broken glass, and the light of the Empyrean poured out like a breached dam.
The nearby Imperial psykers could feel their psychic abilities significantly enhanced. With the veil between the warp and reality broken, they also benefited.
Of course, this benefit was also full of danger.
Once a psyker could not maintain their sanity, they would be corrupted by the warp and turn into those loathsome monsters.
A bloated, rotten head covered in boils, small tentacles, and a pair of giant horns squeezed out of the warp.
The demon was nearly ten meters tall, looked extremely obese, and wielded a rusty greatsword.
Pus flowed from the boils covering its obese body, and plague flies and Nurgling constantly crawled out from within.
After crawling out, the demon let out a huge roar. Guilliman could see the dense, crawling maggots inside its gaping mouth.
What a disgusting demon.
Daemons.
The eternal enemies of the Imperium, the eternal enemies of humanity, formed from the unnatural energy of the warp and given sentience by the Dark Gods, they are products of the warp.
Daemons cannot be killed. The bodies they manifest in the real universe are merely projections; their true forms are in the warp.
When killed, they return to the warp to await resurrection.
Only a few weapons or certain terrifying psykers can truly destroy daemons.
The Emperor's Sword in Guilliman's hand naturally possesses the ability to destroy daemons.
Shortly after his resurrection, he had used this sword to kill a traitor who had been favored by Khorne and ascended to daemonhood.
The composition of warp daemons is very complex, with most being shaped by the Chaos Gods.
Others are formed by the unique worship or specific emotions of various races.
For example, humanity's curse, the only being in the warp capable of killing the Emperor, the demon: The End of Empires Drach'nyen.
Drach'nyen severely wounded the Emperor during the Webway War, accelerating the collapse of humanity's position in the war.
The battle against Drach'nyen was the most unfavorable battle the Emperor had experienced in his long life among countless battles.
The Emperor was completely overwhelmed by Drach'nyen, and after only a few exchanges, he was covered in wounds.
Finally, with the help of loyal Custodians, he sealed the terrifying daemon, allowing that Custodian to carry the demon sealed within his body away from the Webway.
It was because of The End of Empires that in the subsequent final battle, the Emperor was severely wounded by Horus, who was supported by the Dark Gods, and was forced to enter the Golden Throne.
The Webway War, Drach'nyen, and maintaining the reality veil of Terra, these actions all exhausted the Emperor, leaving him unable to cope with the combined assault of the Four Gods.
Fortunately, Sanguinius, who was brutally killed by Horus, used all his power before death to leave a gap in the traitor's armor.
The Emperor was finally able to kill Horus through this gap with the help of Ollanius Persson.
Besides Drach'nyen, which nearly changed the outcome of the Horus Heresy, there was also the assault on the Mountain Array, which severely wounded the Imperial Fists Legion during the Solar War, and the demon Samus, who nearly killed the loyalist Loken. These were also warp daemons not belonging to the Four Gods.
Loken was once a subordinate of Horus, a member of the Four King Council. On the planet Istvaan III, because he refused to betray the Emperor and the noble dream of humanity's transcendence, he was listed as a purge target by Horus.
Leading the surviving loyalist warriors in isolation, he resisted the attacks of another traitor Primarch, Angron, for several months on Istvaan III, delaying the progress of the Horus Heresy.
The loyalists who landed on the surface were all killed in the orbital bombardment launched by Horus, with only he surviving.
Samus, under Horus' command, hunted this rebellious son to demonstrate his determination to replace the Emperor to his other allies, using Loken's death to declare his supreme authority and what fate awaited those who defied him.
To protect Loken, a dreamer who had joined the Great Crusade hoping to leave a complete history for humanity, a female remembrancer named Mersadie chose self-sacrifice and banished Samus.
Besides these two, there are many other warp daemons that do not belong to the Chaos Gods, such as Be'lakor. They form their own factions and usually fight among themselves or serve one of the Chaos Gods, battling enemies on the Eternal Battlefield.
However, when the Chaos Gods invade the real world, they unite with the Chaos Gods to harvest human fear, emotions, and souls.
The daemons summoned by the Plague Marines belong to their faction, the Plague daemons, also known as Nurgle daemons.
These daemons serve the Dark God - Nurgle, their purpose being to spread plague to the real world.
"A Primarch??"
The Nurgle demon entering the battlefield immediately saw Guilliman holding the Emperor's Sword.
"A disgusting demon."
Guilliman, still trying to break through the traitors' final defense line, looked at the demon emerging from the warp, his words equally cold.
"Perhaps the unhappy Mortarion needs a family."
The Plague Demon smiled as it looked at Guilliman. "I can take you back. That way Mortarion will be happy."
"That foolish traitor needs a stake to be burned at, and so do you, demon. You still have a chance to go back, otherwise I will burn you to death directly," Guilliman said unceremoniously, raising the Emperor's Sword in his hand and slicing down the last Plague Marine blocking his path, then striding towards the demon.