Nidome no Yuusha - Chapter 176 – Unfolding Revenge

Cao Xin, a young man on earth, died in a car accident, traveled to a troubled world where supplies were scarce, and obtained a “Bronze Immortal Gate”…

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- Description from novelbuddy

Nolan transmigrated into the Marvel universe and became a researcher at Hydra's lab.He awakened the talent of the “Master of Research,” allowing him to perceive and comprehend all truths and knowledge. His body harboured the power of the Spirit of Evolution, capable of absorbing everything to enhance his strength!From the very start, he developed the Super Soldier Serum and that was only the beginning.By studying various extraordinary individuals, he unlocked their abilities and seamlessly integrated them into himself.“I will use science to recreate the gods of Earth and bring Superman into the Marvel universe!”Wolverine's healing factor?“Wolverine, you've already been dissected once. One more time won't hurt!”Super strength? “Hulk, don’t leave!”An iron body? Heat vision? The power that grows by absorbing sunlight? “X-Men, stop right there!”He will make the Ultimate version of Superman!

Luo Qing Chen is a wandering spirit that died thirty thousand years ago, roaming the Chaos Space

In order to not turn into dust, she is bound by an ice cold system to travel through time and space to complete missions.

Girls that pretend to be weak?  Slap them without explaining.

A silly cannon fodder?  Helping them amass treasures.

Meeting a real male god?  All of them will pamper.

System: Dear masters, what do I do if my host even dares bully the heavens?  Waiting for an answer, it’s urgent!

A certain male god: Change systems.

System: ヽ〔?Д?〕丿

- Description from Novelupdates

The novel is about an author who was reincarnated into his novel.This author thought that he would become a hero, like he always wished, but no, his fate was to become a Villain.His fate was to fight against humanity and against the supreme beings who were planning to invade the world.