In the MCU/Marvel with the Omnitrix/Ultimatrix - Chapter 47: Shifting Realities

Kim Jeongjin, an editor of a publishing company on the brink of closing due to bankruptcy, ends up transmigrating inside a fantasy novel as the incompetent youngest son of a wealthy family.

And here he thought that he should live a rich life in this life…

“Why was I given a high-level skill? Don’t even bother!”

All Raven ever wanted was a chance — to go to college, make friends, be loved, and live like any other girl her age. But dreams, it seemed, weren’t meant for people like her.As a scholarship student at an elite university built for the wealthy and privileged, Raven's life quickly spiraled into a nightmare. Surrounded by cruelty and entitlement, she became the perfect target. Their relentless torment stripped her of everything — her dignity, her hope, her will to live. She bore it all in silence, blaming herself even for the tragedy that tore her family apart. Despair led her to the edge of suicide, but fate had other plans.Ten years later, those same bullies, now living lavish lives of success and luxury, had long forgotten the girl they destroyed. But Raven hadn’t forgotten them — not one bit.With scars that ran deep and a heart hardened by pain, she returned — no longer the fragile girl they once broke. One by one, she would visit her tormentors, delivering her own brand of justice and making them learn that every cruel action has a consequence.Because this time, Raven isn’t the victim.She’s the reckoning!

A Heavenly God was transmigrated into a different world right after he died. After arriving in that world, he resides in the body of a handsome young man with a mechanical voice inside his head providing him with missions. It also kept on telling him to brew wine every single day.

Chen Sha came to a world of immortal martial arts and was ordered to take charge of the world’s first sect.

Before his death, the previous chief told him:

“If you don’t become the best in the world for one day, you are not allowed to go down the mountain for one day.”

So he closed himself in painstakingly, crossed the heaven gate in his body, and faced off against the ancient and modern powerhouses…

…

Many years later, Chen Sha recalled the day he went down the mountain,

From the moment he descended the mountain, he was number one in the world.

In the next ten epochs, any gods and demons have returned, immortals and Buddhas have lived in the world, ancient powers and ancient gods have appeared one after another.

No matter how the times change, he has always been No. 1 in the world and has never changed.

- Description from novelbuddy