Second Reincarnation: Villain in My Girlfriend's Novel

Stabbed to death by the hands of his own wife, Lunar got reincarnated into the world of a modern fantasy novel written by his deceased girlfriend.  The protagonist of this world was a reincarnated cold-blooded 'Winter Sword Goddess,' and humanity was nothing but a mere pawn of gods.  The weak were at the mercy of the strong, and they had no control over their fate. But Lunar, who was reincarnated as a weak villain in this world, refused to accept his fate and be trampled upon. "Fate is weak before the courageous and strong before the coward. I will be the one in control of my own fate." "No law or morality shall bind me in this life. My only goal and obsession is to become the Eternal Sovereign, rising above the universe, living an eternal life, toying with galaxies, and doing exactly as my heart pleases." "For this goal, it didn't matter if I became the enemy of the world. I will be the true villain on the evil path, merciless and cruel. I will stop at nothing to achieve my goal." In this world where the awakened were called heroes of humanity, Lunar would be an evil villain, wearing the mask of a righteous hero—the mastermind hiding in the shadows, using his wits and future knowledge to rise from the bottom, manipulating even the gods to his will, and stealing all the opportunities for his own benefit. For himself, in this world, which would soon face a cataclysm and an invasion of the Abyss, he would even swallow the World of Trials given to humanity for their survival. But at the end of his journey, would he be able to achieve his goal of becoming the Eternal Sovereign? Let's find out.