I choose a C ranked hero in another world, I was mocked online - Chapter 372 Director General: The Invincible Sword Immortal!

This is an alternate history. Decades after the fall of the Eastern Jin Dynasty, the world is still in chaos, although there is hope for reunification.

Liu Ergou grew up in the village and studied medical skills with his grandfather. After his grandfather died, the responsibility of treating the villagers falls on him. But an accident bestows upon him an inheritance from his great-grandfather, which sets him on the path to invincibility!

Derek McCoy was a man that since his youth had to face many adversities. Often forced to settle with surviving rather than living, had finally found his place in the world, until everything was taken from him one last time. After losing his life to avenge his brother, he reincarnates until he finds a world worth living for, a world filled with magic and monsters. Follow him along his journey, from grieving brother to alien soldier. From infant to Supreme Magus.

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Tags: Transmigration, Male MC, Western Fantasy
Schedule: 1 chapter per day
Chapter Lenght: 1700 - 2000 words but usually are even longer
Warning: The MC is not an hero nor an anti-hero. He is a broken, cynic and misanthropic person looking only for his own gain. If you are looking for a forgiving, nice, MC that goes around saving people in distress, this is not your cup of tea.
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I don't own the cover but wasn't able to find the author.

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?