Her First Sword After Making It Big Was for Me, the Man She Loved

[No female lead + invincible domination + pure power fantasy] Three years of selfless devotion earn him nothing but his girlfriend's first act after making it big: cutting down the man she once loved. She says she has soared into the clouds to become a true phoenix. How could she stay with a shrimp in a shallow pond? He has lived through a hundred thousand reincarnations. Only in death does he realize that I am me... ... With a flip of my hand, I command the Milky Way; with a pinch of my fingers, I pluck the stars. There is no one like me in this world... ... Eternity rushes by, and all races vie for glory, yet all bow down. Tell me, beneath this boundless starry sky, who stands at the peak? I am the foremost immortal in all the world...