To Be a Power in the Shadows! - Chapter 61

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…

This is a story about a young man who sought to fight against his destiny. With the help from billions of Dragon Energies trapped on the Rising Dragon Pillar in his body, he emerged from the dark and quenched himself with the blood of ancient dragons. He fought the heaven with the Buddhist Art for the people he loved and built the Eternity Kingdom with his own hands. This is a story about the rise of the Martial Emperor who will rule both earth and heaven.

- Description from Novelupdates

Leguna. An orphan. His life changed dramatically the day the thieves’ guild happened to select him for training and development. He would go on to become lifelong friends with a loyal mercenary, the partner of a beautiful magus who was cold as ice, the savior of a mysterious disfigured dark-elf girl with a talent for the Breath, and the unlikely caregiver for a feisty young maiden. And yet, who would be with him to the very end?

Once she crossed through, she actually became the disfavored third WangFei?