Seirei Tsukai no Blade Dance - Volume 19, Chapter 2 - The Truth Twenty-years Prior

Jack transmigrated to a parallel world and locked on to a Judge System that provided rewards for punishing evil. Hence, an Adjudicator of Death who stood above the law was hence born.

When natural disasters ran rampant, with extreme cold and storms spreading endlessly…When the world mutated, zombies surged like tides, and eerie horrors emerged…When the apocalypse descended, massive Devouring Abysses hundreds of kilometers in diameter began appearing around the globe…When people looked up at the atmospheric cloud layers and saw the slowly emerging corpse of a colossal evil god…From that day, people began to notice that daylight was arriving later and later, until the sun no longer rose, plunging the world into an unending polar night.For survival, on that day, the Apocalypse Radio made its final broadcast to the world:“Everyone, flee eastward—escape to dawn!”…Lin Xian awakened the [Mechanical Heart] ability. He could devour machinery to gain various mysterious skills, scan machines to obtain blueprints for manufacturing, and even use his thoughts to achieve unified control of different machines.Thus, he found a 200-ton heavy gas-powered locomotive, towing specially modified storage, planting, production, medical, and living carriages, and embarked on a 320,000-kilometer journey along the planetary orbital rail—charging eastward toward the dawn!

A guy became a brother of Iron man and got the ability to extract genes from anyone. Lets see how he changed the Marvel World

- Description from Novelupdates

Reincarnated as the first prince of the Jing Dynasty, Jiang Changsheng was transferred by a traitor as soon as he was born, and then he was sent to a temple to become an ordinary little Taoist priest.

From the prince to the little Taoist priest who no one cares about, his life has fallen. Fortunately, Jiang Changsheng has activated the survival system and has an infinite lifespan. As long as he survives the hardships of life, he can get a survival reward.

He was almost killed by his brother while practicing martial arts, but survived by luck and got the leg of the gods.

Encountered an earthquake, was nearly killed by the beam of the house, and obtained the Nine Searching Heavenly Dragon Step.

The demons roamed the capital, passed it safely, and obtained the magic weapon to conquer the demon pestle.

…

There are many dynasties, demons are rampant, and martial arts rule the world. This is a world without immortals and gods, and Taoism is hidden in the halls and mountains.

Three hundred years later.

When the Jing Dynasty was prosperous, it ushered in decline, the princes rose together, the emperor became a puppet in the hands of the heroes, split the dynasty, and fought for decades.

The puppet emperor Jiang Xuanzhen came to the Taoist temple and knelt down and cried, “My descendants are not filial and unable to return to heaven, please ask our ancestors to ascend the throne and continue my grand scene for another 300 years!”

- Description from novelbuddy