I have Immortality In The Cultivation World - Chapter 30 - : The Mainstay of Rejuvenation

In a world where magic is forbidden and witches are hunted, Ashlynn Blackwell has hidden her mark of the witch since birth. The night of her wedding she's betrayed and her secret is exposed. Attacked by her husband and his knights, Ashlynn was abandoned and left for dead in the wilderness.Rescued by the vampire lady Nyrielle, Ashlynn is offered a choice: die as a human or embrace her power as a witch. Bound by a mystical blood pact, Ashlynn is plunged into a world of ancient magic, immortal vampires, and deadly political intrigue for the chance to find eternal love.

The servant looked at the grieving princess. “Your Highness, the Regent Prince sent your scholar fiancé to the Western Butcher’s daughter!” 

The princess gritted her teeth, speaking to her servant that it matters not as she has other suitors in line. Many days later, much to her dismay, the servant ran in a hurry. “Your Highness, the Regent Prince expressed his intention of becoming your suitor! All other men in line were sold to Gou Lan Red District!”

The princess was distressed. She said to her servant it matters not. She’ll soon be married to Prince Fuma. Then the uneventful came. The servant once more ran to her, almost tripping in the process. “Your Highness, Prince Fuma was imprisoned at home! Meanwhile, there’s a red sedan chair waiting at your residence for your marriage! It was led by the Regent Prince!

The princess was stunned. For a day such as this to come, it seemed impossible. This nothing but a sad story of a female boss crossing back in time to hold the thick thighs of the big boss. But while raising him, she was eaten in the process.

- Description from Novelupdates

After an accidental death, in order to continue to live, Gu Bai had to choose to go through various wonderful books to complete tasks.

Every time he became a variety of small cannon fodder inside the story, Gu Bai’s code of conduct when completing task is – by all means, don’t be inferior, don’t be shameless, don’t be upright… hold on to a golden thigh.

… N times after transmigrating

Cannon fodder: (angry contempt) … You’re already so powerful, why are you still shamelessly holding on to a golden thigh to deal with us!?

Gu Bai: (deadpan) That… holding and holding… got used to it…

- Description from Novelupdates

The mighty void dragons are on the brink of extinction due to a strange condition. Their bodies have suddenly started rejecting their kind.

Due to that, Arad's mother dropped his egg into a forest where he could hatch safely, leaving him with a fragment of her consciousness and informing him of the condition of their race.

From that point, his goal became clear. To save their race by either mating a lot or finding a cure for their condition.

But, sadly, nothing is ever that easy. Arad is still practically a newborn and cannot tap into the terrifying might of his race, and his rarity makes him a prime target for mages and scholars seeking to study the dying race.