Xia Moan, a hardcore base-building and resource management game enthusiast, is summoned by the desperate half-demon Talia Ronoway. He journeys to another world and is unexpectedly possessed by an ancient cursed armor. He builds the most powerful Demon King's city from scratch in the harsh underground demonic realm! What? Building a dungeon is difficult? Here's the "Alien Underground Colony Construction System"! The most advanced technology is indistinguishable from magic, and the most rational science will incorporate magic into its systems! The stage of elven lords, dwarven princes, and demihumans is gradually coming to an end. The struggle of the four kingdoms, the war of kings, the era of humanity has just begun! The world is so big, why not go and see it? The tunnels of the earth-devouring demon worms create an underground ecological maze. The wasteland is the gold mine and burial ground of the Adventurer's League, and the back garden of the demon rulers! Magic stone warriors,...

In the blizzard-ravaged northern reaches of the Empire, the Lord's Mansion of Theros Patterston stands tall upon the icy plains. Rebellion, poverty, endless blizzards, and the impending tide of beasts await. Just as the future seemed bleak, the cheat code for the Lord System activated. The Lord's Intelligence Panel granted him the ability to exploit information gaps and foresight; the Lord's Data Panel allowed him to clearly visualize his own progress; and the Lord's Summoning Panel allowed him to summon players, granting them the power of the fourth Scourge—the player army—a fearless force capable of infinite resurrection and possessing astonishing creative and destructive power! ... "Your waves of beasts are endless, while my players cost 30 energy points each and have built-in resurrection." While the Imperial family that exiled him continued to vie for power, Theros's cavalry and the player army had already crushed...

A giant dragon entwined on a golden mountain, a griffin soaring through the sky, orcs fiercely battling in the wilderness... a divine sword spanning a chasm, a church nestled in a small town, a spring flowing through the continent... all of this is recorded in the "Adventurer's Album," created by the legendary spellcaster Levi, a work equally as famous as the "Adventurer's Handbook." Levi journeyed into a fantastical world of swords and sorcery, initially merely wanting to draw these unfamiliar characters and scenes. But then he befriended dragons, drank with demons, and painted succubi... It all began with his famous adventurer's motto: "Adventurers must take risks."

Before the Grand Imperial City of Sol, the Southern Duchy's regal princess, Inanna Augusta, renowned for her iron-fisted ways, gritted her teeth as she clutched the shreds of her dress that barely covered her vitals, revealing the shattered silver armor beneath, creating a startling scene. She gazed at the screaming, wielding weapons of goblins, orcs, dark elves, barbarians, and imps... and pleaded, "Warriors, why have you come to this?" "Waaaaaaaaaa!!" "The Blue Heaven is dead, the Yellow Heaven reigns!" "The world belongs to the Wings of the Abyss!" "The Abyss nobility reigns!" "Damn it, who touched my ass?" Then, a gust of black wings covered the sky. Levis, the Wings of the Abyss, the last true dragon lord, protector of the abyss, driver of the cancer of the world, the sinful black dragon, said helplessly, "When did I ever say I would conquer the world?"