Reincarnated as the Only Human - Chapter 929: Speaking My Language

Mark is a genius military weapon designer who was kidnapped by a mafia gang after refusing to work for them.
They forced him to design unique weapons for five years, until one day he successfully escaped only to get shot by his trusted comrades.
*Ding! You awakened a weapon system.
When he opened his eyes, he was in a different body and in a different world.
"You want to kill a wild boar without being detected? Forget about bow and arrow. Here, I present you this sniper rifle."
"You want to kill a horde of goblins from the sky? Forget about those flying carpets and brooms. Here, I present you the fighter jet."
"You want to kill a dragon? Forget about taking the help of the S-class adventure team. Here, I present you a nuclear bomb."
Join Mark Spencer/ Lu Zhen as he brings the whole world to its knees with the help of his weapon system.
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Note: Author isn't born in an English-speaking nation and has no editor either. So, please be understanding if there are any grammatical errors.
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In a post-apocalyptic fantasy world layered into multiple realms, humanity faces extinction due to their endangerment of the main realm. Forced to merge all realms back into one, a deity grants humans a leveling system to empower them, lest they become extinct when facing the mythical creatures. Noah, our protagonist, embraces the role of a monster tamer, trading his humanity for strength and eventually transforming into a monster himself. As Noah struggles with his evolving identity, he must navigate a world where the line between human and monster becomes increasingly blurred.

A one-night stand was all she wanted. A one-night stand was not his style. Still, they ended up together in a night of passion. No names, no feelings, and no complications.

They thought that their unexpected encounter was an isolated incident. However, fate had something else in mind.

As they found each other, back in each other’s arms. Not in a passionate embrace, but with a contract that would bind them for a long time. An agreement they were both bond to honor.

Daniella Hamilton was an heiress who wanted nothing to do with her father and her inheritance. She pursued her career to become a lawyer for the masses who could not defend themselves from the injustice in their current judicial system.

Alexander Princeton, as the name suggested, was a possible heir, next in line to his father, the Duke of the Blackstone House. He also wanted nothing to do with the title or the prestige of the dying Royal Empire. To him, wealth was the real power.

Would their agreement lead them to the fulfillment of their dreams or would it end up in a disastrous union?

The hero who was killed by the demon king ended up reincarnated as the son of the one who killed him! Thus began the life of the hero who donned in the mask of the ideal demon prince to topple his own kingdom while doing his best to prevent anyone from discovering his identity―― But to do that and blend into the demon tribe society, he had to kill his former comrades. Nevertheless, to become stronger, to save humanity, he had to walk through all kinds of paths of carnage! This is the tale of the demon race’s fake prince destroying his own kingdom.

O Hero, Trample Those Who You Should Protect!

TN: Most part of the other character in the novel is depicted from a non-human perspective so expect something that is completely different from the common sense of human.