One Piece: From the Rocks Era to King of the World - Chapter 427 - : Xiliu’s Following

Some say reincarnation is a blessing, but for me, it's a dreadful curse. Cursed with endless reincarnation, I've been reborn as a villain 137 times. And all 137 times, I've been toyed with and killed by heroes who are far more cruel than the said villains... If I can't win no matter what I do, then I'll crush those so-called heroes at their very roots. - Quality Fan Translations, Made by Fans for the Fans - Villain Takes Over The Academy

She was bored, so the Emperor accompanied her as she played in the three thousand realms and caught a phoenix for her to sit on. When she has cravings, the Emperor crossed through space to gather all kinds of delicacies and immortal fruits for her. Later on, she liked little kids, the Emperor tricked her, saying if she becomes the Empress, she’ll get her own kid. And like that, she became the Empress and got tricked by the Emperor into bed. However, she reincarnated and forgot everything…..

- Description from Novelupdates

An ultimate warrior, the one and only Alchemy Emperor, Ling Han, died in his quest to achieve godhood. Ten thousands years later, he, with the ‘Invincible Heaven Scroll’, was reborn in the body of a young man with the same name. From then on, winds and clouds moved as he set himself against the uncountable geniuses of this new era. His path of becoming a legend has begun once more. Of all eras underneath the heavens, I am the strongest!

- Description from Novelupdates