Skeleton Knight, in Another World - Chapter 18Volume 7 -

One day, I woke up only find out that I’d become a Demon Lord, an individual responsible for protecting a dungeon. The world I’d been spirited away to was one filled with violence. Gigantic monsters wandered through it and competed with each other each and every day for the right to survive. I had no choice but to strengthen my dungeon’s defenses in hopes of living another day—or at least that was what I’d thought. For some odd reason, I instead ended up spending my days in relaxation and bliss.

Chu Yunsheng’s head hurts every time he wakes up. Because he is usually either lying in the villain’s bed, or had just gotten up from the villain’s bed.

The reason why villains are called villains is because they are extremely lethal and vengeful… and they love to blacken…

Villain: Bastard, I will castrate you!

Chu Yunsheng: …Oh.

- Description from Novelupdates

In a world teetering on the brink of chaos, where eldritch gods peer into mortal realms and monsters stalk the land, Lu Yu finds himself moments away from a gruesome end as a sacrifice to a sinister deity. Just as the cold altar awaits him, a glimmer of hope emerges: he activates the Monster Editing System.With this arcane power, Lu Yu can extract materials from all things and fuse them to create unimaginable creatures. Each monster grants him a portion of its strength and a unique, terrifying skill. From that moment, Lu Yu embarks on a perilous game of wits and power against the ancient, malevolent gods.99 Demonic Eyes+ Cyclops Body + Primordial Chaos Stone = Chaos Evil Eye: its gaze alone spells death, obliterating all under the curse of its Mystic Death Stare.Angel’s Blood+ Nightmare’s Corpse = Holy Nightmare: a being that commands the dimensional ability Paradise Descent, fusing heaven and hell into an inescapable exile.Seed of the Dusk World+ Mutant Drake Egg = Endbringer Dragon: the avatar of apocalypse, wielding the Calamity Domain to usher in the end of all things.From the shadows, he crafts horrors beyond comprehension: Void Shadow Spider, Hundred-Armed Giant, Soul-Banshee, and Endbringer Dragon. Each creation shakes the fabric of reality itself. Even as his creations grow in power, they spiral further beyond mortal understanding, defying natural laws. The gods, once indifferent, now tremble as their monstrous rival rises.Can Lu Yu’s ingenuity and monstrous legion prevail in the deadly dance with gods? Or will the ancient, inscrutable powers crush him before his ultimate creation takes shape?The monsters are limitless, and even the gods dare not look away…

Summoning ceremonies can freely call forth even “those which lurk in the depths beyond the gods”. One boy has top-level abilities even among the cutting-edge summoners who can use those ceremonies. He is Alice (with) Rabbit aka Shiroyama Kyousuke. But this strongest boy summoner has a single fatal weakness. Certain “cursed words” spoken by girls: “Help me.”

When Kyousuke hears those words from Meinokawa Higan, a girl brought to the verge of death, he throws himself into a city where three great summoner forces clash!