If one were to transplant 'Hell' to Earth, would it resemble something like this?
The skies were filled with thick black clouds that showed no signs of abating. The ground below was, in turn, saturated with blood, screams, ashes, and a suffocating stench.
Demons were born from the darkness with the sole purpose of destroying everything, and so, they proceeded to systematically erase any semblance of light and life from this world.
The Demon Lord stood in front of them. He stepped proudly on top of the city now reduced to ash and swept its gaze all over its surroundings.
"To be honest, the humans in this world are faring better against my army than those in the previous realms I've been."
The reason he hadn't made a move yet is because he has been observing the humans battling his army, either out of curiosity or for his own twisted amusement.
If he wanted to, he could have annihilated them all without batting an eye, but from what he had seen, they managed to survive for several days which most nations and empires in all manaless worlds he had been to wouldn't last than a day to survive against the first wave of his demon army.
Remarkably, they had even defeated several Baron-rank demons and, astonishingly, even a Viscount-rank demon.
In all the manaless worlds he had previously invaded, the inhabitants were so pathetically weak that they were unable to defeat a single Baron-rank demon, and often mistook such demons for Demon Lords, which he found laughable to hear.
"Mist, arise."
As the words fell, a thick fog began to rise from the ground, and even more fog emanated from the Demon Lord's body. The fog acted as a barrier, obstructing the sight of Humans.
It had blotted out the sky and hid the moon, turning that part of the area dim and hazy. It shrouded not just General Santos, but even the expanse of sky above the city.
'I wonder if I have truly mistaken this for a low-level world,' he mused.
To confirm his suspicion, he used his high-level magic perception to see any signs of mana on this world, because other than biomatter and souls to devour from this world to make themselves slightly stronger, a world with mana is a treasure place for demons like him as they could convert or corrupt its energy into demonic energy, transforming this mana-rich world into a habitable place for demons instead of devouring everything and leaving it as a lifeless rock drifting in the vacuum of space.
For the first time in an extremely long while, when he used his advanced-level [Magic Perception] skill, the Demon Lord's heart that went dormant while wandering within the gap between dimensions had begun beating powerfully once again.
His assumptions were indeed correct. This was not a manaless world but one brimming with a more powerful surge of mana than any world he had ever encountered.
Finally, there would be enemies that could truly threaten his life. The true war was at hand.
To the Demon Lord, the sight of the battlefield filled with sheer, uncontrolled madness from all parties involved was pretty much the same thing as a marvelous gift from the heavens.
Could anything be compared to the pure joy derived from such battles?
Too bad the event he had been waiting for didn't materialize.
The Demon Lord grew more anxious as time continued to pass by.
Desiring to fight against the powerhouses of this world now, he wanted to get rid of all the nuisances bothering him as soon as possible and get ready for the battle against the truly strong beings that existed here, so without a doubt, the current situation was proving to be rather annoying.
It was then...
"It's nice to see you again in this Physical Plane, my Lord. Or should I say my old friend Andromalius?"
A voice interrupted the Demon Lord's deep deliberation.
Andromalius looked down at the source of the voice and saw four beings of great power kneeling before him. One of them he recognized as Duke Azmaveth, known to many as one of the representation of Death.
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While not literally Death itself, Azmaveth possessed many death-manipulation spells, making him a powerful Duke-rank demon within the Envy Clan. He was an old friend of Andromalius during their time collaborating their armies and invading countless worlds. He had known him for many millennia, but the other three behind him, not so much.
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"I will do just fine, Duke Azmaveth," Andromalius said before glancing at the other three, and despite having an emotionless face, Azmaveth seemed to know what he was thinking.
"Milord, meet your three greatest followers, which are Archdemons in the Marquis-rank. Introduce yourselves," Death commanded them.
The one in white stepped forward before falling into a bow again, "I am known as Lord Marquiss Conquest. I do not remember my past before I became an Archdemon of the Greed clan except for the fact I conquered many lands before being betrayed by my son."
The one wielding a giant sword stepped forward as well and laid his weapon down at Andromalius' feet.
"I am called Lord Duke War. I was once a mighty king from the Golren System in the Celestial Sea. We achieved travel through the stars and waged war with many worlds till my kingdom controlled a thousand star systems. Before becoming an Archdemon of the Wrath Clan, I was killed by old age and left behind a falling kingdom."
The only female of the group stepped forward before falling into a kneeling position, her dragon-like tail wagging behind her, "I gained the title Lady Duke Famine. I was the empress to a relatively small empire in my home world, but through some questionable means, I managed to expand the borders by ruining other nations' crops, starving their citizens and troops into submission to me. Before I became an Archdemon of the Gluttony clan, I fell in battle against a mighty dragon who Lord Death has bonded me with."
"And as the Four Horsemen of the Apocalypse, we swear to serve you faithfully till the day you no longer have need of us," they all said as one.
Andromalius nodded in approval, "I thank you for your loyalty. I'm sure we will get along very well," he said before turning to Death, "Azmaveth, inform these three our current situation. I will address the army regarding our offensive."
Death bowed his head before speaking, "As you wish, milord."
Turning his back against the four, Andromalius moved forward towards the edge of the building, where he faced a red sea of monsters.
"Rise, my Legions! Your Lord has called for you! Let us all bring damnation into this world and let them hear the message of the army of Lucifer!" Demon Lord Andromalius ordered.
At the front of Andromalius were thousands of demons, consisting of Demonized Humans, Demonic Knights, Hell Mounts, Demons with bladed limbs, flying bottomless Demons, Angelic Demons, Demonic Beasts, Hell Dragons, and many, many others. They all kneeled down in front of Andromalius in reverence, and awaited his orders.
"What a wonderful day this is! My children, it is now time for another world to fall into the hands of the army of Lucifer! Let us all sing praises and glory to our Lord in Hell!" Andromalius declared, smirking as the golden-crimson irises in his pitch-black eyes burst with happiness and elation.
"As the 72nd Demon Lord, appointed by the king of all the netherworld. I, Andromalius, order each one of you to slaughter, enslave, pillage, devour, and corrupt the inhabitants of this world dry! Forward!"
With a single order, hundreds, no, thousands of demons surged forward, and began moving outside of their conquered territory.
The offensive of the demons had begun.