MTL - Rivals of Rebirth - Chapter 40 start

Deep below the earth's surface, a mystifying subterranean seascape lurks, an archipelago bathed in inky blackness where suspense and horror hold court. Here lie strange islands and even stranger monsters, far beyond the realms of human imagination. In this domain, mankind is far from dominant; instead, madness and death rule supreme.

Pleading for mercy from the unknown creatures of the deep only leads to a slow, tortured existence. The trapped survivors gradually distort, losing what made them human, both physically and mentally, to the gloom as they remain trapped in this eternal obscurity. Their only hope? A perilous expedition into uncharted sea territories.

Fueled by determination, Charles embark on this daunting voyage aboard his steamship, aiming to reclaim humanity's past glory. Together with his crew, they sought a way out of this hidden sea world, a path back to the sunlit world above, where humans once stood tall.

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I read a few comments from Chinese readers that compared this novel with Lord of Mysteries because of similar elements: Lovecraftian, western fantasy, first industrial revolution, and steampunk. However, I have yet to finish reading Lord of Mysteries to do any actual comparison, but I do think those who have enjoyed that novel would enjoy this as well. Also, the author of LotM, Cuttlefish That Loves Diving, also did a shout-out for this novel, so I guess he approves of it too?

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Dear readers! Without any ads, maybe you will prefer .

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

One day, Katsuragi Daichi and his classmates found themselves in a different world. The god who summoned them to another world divided its power and gave it to them, saying that it wanted Daichi and the rest to defeat the Demon King as heroes. However, Daichi alone was given no abilities. And sure enough, Daichi was thrown away and used as a decoy in a demon’s den. Eaten by a demon, Daichi had lost consciousness and thought he had passed away, though when he came to he noticed his statuses had skyrocketed. He had obtained『Revenge of the Resented』. Every time he died, his abnormal ability powered up.

Her – a glutton without troubles or worries who crossed over and became a young fat chick with a deep vengefulness.