Zero To Hero In The Martial Arts Library - Chapter 720 - The Man Who Will Become the Pirate King

In her past life, Shen Xi always longed for love and validation from her parents, members of the wealthy Su family. Unfortunately, the attention that she yearned for was stolen by the family’s fake heiress – her elder sister, Su Ruowan.

She, the “godly doctor” of an assassin organization in 21st century, transmigrated into the body of Yun Family’s abandoned, good-for-nothing Ninth Miss. Good-for-nothing? Then she’ll let the world see what a real good-for-nothing looks like. Summoners are legendary? Nothing is impossible in this world! She’ll become the first Magical Summoner.

Collection of short stories.

- Description from Novelupdates

In a certain world, there was someone who excelled in magic combat, people called him 『Sage』. Seeking the strongest combat art, he devoted himself to research every magic and combat arts in existence. And the conclusion he arrived at was very cruel, 『My body is not fit for magic combat』. Yet he didn’t give up. He sealed his own soul with a magic art, and was reborn in a far-off future. And the magic theory in the completely changed world he saw there was of unbelievably low level.