Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 15 - 15-6. Temple Knights

A college student, accidentally reborn into the world of Naruto, becomes a member of Uchiha who is destined to be exterminated.

In this cruel ninja world, in the face of endless wars and exclusion from the village, what will Uchiha Qing do?

PS: Later in the book, the protagonist will develop a system of immortal cultivation. Cultivating Immortals in the Ninja World, have you seen it?

- Description from novelbuddy

She is the legendary queen of mercenaries whose name daunts even the big shots in society. With an ancient jade pendant in her hand, she is great at almost everything, be it seeking the truth or the art of healing.

Zhou Yun transmigrated to a fantasy world and was bound to the God Tier Epiphany System. He could enter into a state of meditation and achieve epiphanies that others desired regardless of what he did.

Other cultivators immersed themselves fully in hardcore training in order to achieve some improvements in their swordsmanship.

On the other hand, Zhou Yun achieved enlightenment in swordsmanship by merely picking up a sword and playing with it a little. His swordsmanship attained perfection in an instant.

Other cultivators trained hard in order to break through to the next plane.

Zhou Yun merely swept a glance at the fallen leaves in the courtyard. Then, he had an epiphany and broke through to the next plane on the spot. He had insights into everything in the world, and his rate of plane progression skyrocketed.

When other cultivators finally became powerful existences after going through various hardships, Zhou Yun had already become the supreme existence through having countless epiphanies.

Her – a glutton without troubles or worries who crossed over and became a young fat chick with a deep vengefulness.