Building The Strongest Territory With My Sacrifice System - Chapter 18: Level up

In the year 3000, the Earth shattered and it was torn open by a rift between realms that unleashed ancient beasts, magical chaos, and apocalyptic storms. Civilization crumbled, giving rise to a brutal new law: Tame or be Torn Apart. Beast Tamers, bonded to mutated and other creatures now rule what remains of the world through strength, savagery, and guild-driven power.Kelvin, a scavenger scraping by in the ruins, lives in the shadow of these warlords until he unearths Xerion, the End-Tyrant, a legendary primordial beast sealed beneath the earth. Bound by a forgotten bloodline and a cursed contract, Kelvin inherits the Sigil of the Overlord, thrusting him into a war-torn world where survival is no longer enough.He was hunted by guilds, worshipped by outcasts, and pursued by enemies both human and monstrous, Kelvin must rise from nothing to either unite or destroy what’s left of civilization. As forbidden powers awaken and ancient truths unravel, one man and his beast stand poised to reshape the fate of a world teetering on the edge of annihilation.

Humanity has been gradually transported to the Abyss by a bored god to compete against other races and monsters.The problem is… humanity failed. In a last desperate push the strongest survivors chose a comrade to travel as far as possible back in time.

I fell into a game world out of nowhere with an instant kill skill.
And then somehow, I became a bigshot.