In the MCU/Marvel with the Omnitrix/Ultimatrix - Chapter 42: Spiderman

Qinghe County master Gu Sheng died. She had a first class beauty, her name could move the world, but she still lost to the hands of a woman inferior to her. Gu Sheng was only able to understand that she was the antagonist of the heroine after her death, a cannon fodder.

In a pure white space, Gu Sheng was expressionless because of the transmigration.

System: “The heroine must change her fate, must fight against cannon fodder and the passerby to brush a sense of existence. As the master, you are their biggest stone in the way.”

Gu Sheng’s eyes flashed and made a peerless smile, “Then let me see who is the stumbling block that should be trampled and who is the final winner!”

- Description from Novelupdates

In a world where magic and sorcery flourish came a tale of a nobody who grew into a legend. Partake in the conquests and tribulations of a great army where warriors live day-to-day, seeking the thrill of combat.

God: I shall bestow the Saintess upon you.
Pope: W- wait a moment! This is a boy!
God: That is the Saintess.
Pope: ??????

And just like that, the Saintess was raised by the church for fifteen years without any questions asked…

- Description from Novelupdates

Wang Yi gets a key, opening a door in 2022 will lead to 1982, and opening a door in 1982 will return to 2022.

Two very different great eras appeared before him:

Abundant dietary protection, developed industrial products, miraculous medicines, and explosive information, this is 2022.

Simple folk customs, rich wild resources, scattered antiques, and treasures of the age, this is 1982.

Traveling between these two eras, Wang Yi didn’t think much of it, he just wanted to live a good life.

- Description from novelbuddy