Shikkaku Mon no Saikyou Kenja~ Sekai Saikyou no Kenja ga Sarani Tsuyoku Naru Tameni Tenseishimashita~ - Chapter 65 Strongest Sage, Forgotten

A 20-year-old genius medical student transmigrated to a book she read during an experiment and became a female supporting character named Mo Li.

Murong Jiu, the Ninth Young Miss of the Marquis Mansion, was ugly and talentless, and her fate was to harm her relatives. She was raised in the countryside from a young age. Due to her exceptional medical skills, she was used by the Crown Prince, who drained her of all her value and then threw her into a deep well to drown.Only before her death did she realize she had been switched at birth. Others were rightfully enjoying everything that should have been hers; later, all her family died for her, becoming stepping stones for the Crown Prince!Reincarnated, she returned like a vengeful ghost from hell, making her enemies tremble with fear, ready to seek revenge for each grievance.Unexpectedly, she unintentionally became the darling of her biological family, which made her retract her sharp edges.As the substitute Princess Consort of Prince Ling, she and Prince Ling were a fake couple, intent only on finding the real father of the child in her womb, yet unaware that the man from that night was right in front of her…

In the next life time, he would absolutely not become an author.
He would once again be cursed to the danger of crossing over into a book.
During the time when he broke free of his shell, what he first saw was just the handsome, handsome male lead that he had written.
During the time when the male lead was pinching the small soft flesh of his neck, it was also his first time hearing the male lead’s voice.
“Return goods,” the male lead said in this way toward the vendor stall’s owner.
Pei Bufan: “…… meow?”

- Description from Novelupdates

I, Rorschach, the god of the world, the most powerful Kryptonian, the leader of the Justice League, the founder of the Emperor Organization, the gravedigger of countless civilizations in the multiverse, the most handsome man in the world, there is no one!

…………

PS: The non-standard MCU universe can be regarded as a similar parallel universe. The timeline is based on this book, first Marvel Universe, then DC, X-Men…

- Description from novelbuddy