Elf Tensei Kara no Cheat Kenkoku-ki - Chapter 17Vol 5 -2:Castle Siege Destruction Archery《Ballista》

Shao He, heir to a family renowned for medical and poison skills, a top special agent of the 21st century, unexpectedly transmigrated into the body of a pathetic Madam Marquis who had been tortured to death! And on that very night, she was thrown into the Mass Burial Mound!Looking at the newborn in her arms, Shao He resolved to live a splendid life in this foreign world!From then on!She was the Divine Doctor who aided the world!She was the fearsome Poison Queen!She possessed wealth to rival nations!She was also an astonishing scholar!And the Marquis, filled with regret, wished he could kill himself on the spot, “He'er, I was wrong, you...”“Shut up, I am now the Empress!”

Aoki’s resolute face was indifferent. “If the sun doesn’t shine on me, please let me be surrounded by darkness!”
From a different perspective, look at the entire Pokemons world.

- Description from Uukanshu

After what seems to be a plane accident,

Su Bai Master Su was seized of his power and unexpectedly reincarnated onto a cowardly distant nephew.

Who said that you will lead a dull life after rebirth?

The ‘Jade-Faced Yama’ who once ate both the black and white path

vows to take back the power that once belonged to him step by step.

Do you really think Master Su is a rice dumpling for everyone to push around when he does not display his wrath?

- Description from Novelupdates

I was betrayed in my first life.A cripple, broken and discarded—I died after catching the one I loved in bed with the only person I ever called a friend.That was the start of real torment.When I woke up, it was in another world.A goddess stood before me.She told me I could go back.Back to my world.Back to everything I lost.All I had to do… was play my part.The side character.And I did.I followed the script.Played my role to perfection.They hated me.Mocked me.Used me.Again and again.But I kept going. Because I believed her.Because I wanted to go home.Then one day, I found out.The hard way.It was all a lie.There was no going back.There never was.She used me.Again.Just like everyone else.Thrown away like trash once I outlived my usefulness.That was the day something inside me snapped.And so, I made a vow.I would take everything from her.I would enslave every single heroine she chose.And I would kill the hero she placed all her hopes on.If she wanted to protect this world…Then I would burn it down.But the more I tried, the more things started to change.And then one day—I found one of the heroines.One of the hero's yanderes I had enslaved.She stood there, trembling, a knife in her hand.“You’re not going anywhere,” she whispered, eyes wild.“I won’t let them have you. You belong to me.”...What. The. Fuck. Is. Happening?!