MTL - Start with Batman - Chapter 368 Frozen King

He mocked the omegaverse. Now he’s living it—with a baby on the way.Souta Tachibana was just your average, overworked office drone—until his BL-obsessed coworker introduced him to a trashy omegaverse romance novel. Curious (and a little horrified), Souta read it for laughs. But then he died in an accident.Now, he wakes up in the body of Lucien d’Armoire, a minor noble in the empire of Aetheria. No plot relevance. No destined lovers. Just a quiet, boring life as a background beta.Until one morning, he throws up into a chamber pot… and his doctor says something unthinkable:“Baron d’Armoire, you’re pregnant.”Which is impossible.Because he's male.And straight!And because Betas can’t get pregnant.…Right?Except Lucien is no Beta. He’s a rare male Omega. Apparently, during one reckless, drunken night, Lucien slept with an Alpha. Now he's pregnant, confused, and definitely not ready to be a father. To make matters worse—he doesn’t even know who the father is.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Game has become reality, toppling the world’s rules. Humanity has entered an era of global class awakening.Demonic creatures wreak havoc! Secret realms and dungeons proliferate!Terror and treasures coexist! Danger and opportunity walk hand in hand!Only by becoming a class user! And raising your level and becoming stronger! Only then can you stand at the top of the world!On the day of his class awakening, Lin Moyu became a Necromancer, which is a unique hidden class.He obtained a godly talent. Despite being merely a level 1 talent, it amplifies all skills by 10 times.He obtained a godly passive skill, which transfers all damage he suffers to his summons.As a result, so long as his summons aren’t completely annihilated, Lin Moyu won’t die.“An endless swarm of Godly Skeletal Warriors!”“Millions upon millions of Lichs!”“Countless Undead Bone Dragons!”“Can you handle it?”Subjected to curses, gods transform into white bones.When corpses explode, the sky topples and the world collapses.“I sit high upon a throne of bones, treading the boundary between life and death.”“I am a disaster!”

The Prea gods, who saved humanity from living as slaves to other races and established the human empire, passed down their bloodline. Those who inherited their blood were born with magical talent and could become wizards. After thousands of years, the empire fell, and the world became ruled by great masters across different regions.He was a young man who grew up with his mother, never knowing who his father was. Though he possessed tremendous magical abilities, he lived as a shepherd in a rural village. Now he ventures out into the world to discover the secrets of his bloodline.