DelzGB

[The first arc is about obtaining the system, so please be patient and give the story a try! I promise it will be worth it.] 
In a world where gods have erected a worldly monument, the "Tower of Yggdrasil," people are drawn to its impossible challenges. This towering structure pierces the heavens, concealing both unimaginable beasts and priceless treasures within its unforgiving depths.

Enter the realm of "Adventurers" – daring souls who ascend the Tower's brutal floors in pursuit of glory. The fortunate ones secure the sponsorship of gods, gaining their Blessings to wield divine power in the face of peril. Yet, amidst this celestial lottery, Bastian, an unfortunate adventurer, remains unblessed, navigating the treacherous terrain with only caution and cunning.

As Bastian teeters on the brink of death, a mysterious voice intervenes, offering him a lifeline: [Prometheus System Awakened]
Becoming a chosen “Invictus”--a person chosen as the champion of their god, he finds himself in the ranks of legends, having to learn all too quickly to adjust. 
He must defy the odds, unravel the mysteries of Yggdrasil, and face the trials that await beyond the clouds, making either ally or foe of other Invictus, and the gods that dwell in Yggdrasil.

Tower of Yggdrasil: From Zero To Godhood

As quickly as he saw that shattered hand of twisted fingers, it adjusted itself; the bones reforged, strengthened as the once oozing, runny flesh of the entity solidified, hardening with a crystalline glimmer to its obsidian skin.

'--Again,' Alcides instructed himself.

Sprinting forth as his feet crushed the femurs and skulls beneath, even a single, straight run challenged his sense of balance as his ringing, bleeding eardrums screamed at him. Using the sheer speed imbued into his blessed legs, he arrived at the entity's side, swinging his club, only for the being to extend its right hand to intercept it–

Instead, the Invictus pivoted, jumping up as he swung his leg with maximum force, striking at the neck of the ungodly existence. It was a different sensation this time; the malleable form of the being's black flesh was instead rock-solid, causing the man's leg to bounce off.

Nemesis