Mech: Shattering of the Galaxy - Chapter 270 - 46 The Boy Wielding the Giant Cannon

Cha Myung-jun, a sergeant who neared the end of his military service, found himself confined in the Ministry of National Defense’s bas**ent for over three decades due to his newly awakened abilities, just before the outbreak of war. Spending thirty years as the world’s most formidable blacksmith, wielding nothing but hammers, he skillfully outwits the watchful eyes of the Ministry of Defense to serve the war effort and reset the course of time. Now given a second chance at life, can he lead a successful campaign to avert humanity’s downfall and secure its salvation?

“After finding himself transported into a vastly different existence, a man wakes up not as a mogul or heir, but in a modest mountain life with only a younger sibling and six acres of farmland for company. Accompanying him is a miraculous farming system that transforms his simple life into an incredible adventure.Initially hesitant to accept his new role as a farmer, he soon becomes engrossed by the system’s perks. Planting seeds yields $8000, while harvesting crops brings an additional $10,000. Moreover, unique rewards make this occupation surprisingly profitable. Astonishingly, all transactions are in dollars, rapidly increasing his net worth to $10 million. Farming, unexpectedly, becomes an extraordinary endeavor.His life is peaceful, immersed in nature’s beauty and the rhythm of rural living. However, tranquility is broken when a group, including a captivated woman, discovers his farm. They are amazed by his well-tended watermelons and by him, raising questions about his serene life. What secrets does this encounter bring, and what adventures await beyond his mountain retreat?”

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

In a future timeline, the earth was visited by a species known as the Slarkovs.
Having lost their home planet and in search of a new one, earth was the next habitable planet for them.

Humans and Slarkovs made a deal with each other in return for the Slarkovs living on earth.
The Slarkovs traded their technology and knowledge for a new home.
They were similar to humans except for some of them who had slight differences so fitting into the society wasn't a problem.
Over the years Slarkovs and humans began to mate with one another and reproduce offsprings.
This in turn created a new species known as the mixed-blood.
Centuries later mixedbloods could tap into their bloodline and perform unimaginable feats.

Gustav born into an age where bloodline determines everything, struggles to fit with a useless bloodline.
His bloodline only grants him the ability to change his hair color, destroying his hopes and dreams for a great future.
His fate is turned around when an unexpected situation leads to him finding a system that grants him the power to unlock and upgrade bloodlines by completing quests but he's baffled by two quests with a five-year deadline. Success will grant him unimaginable rewards...
But only one thing awaits him if he fails... Death!

Follow Gustav on his interesting journey filled with unprecedented adventures, danger and death, maybe?