MTL - I’ve Possessed the Demon Sovereign’s Body (I Possessed a Demon Sovereign) - Chapter 741 Inside and outside

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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Kieran Silver is a young man who suffered from the deceit of his superiors. His outstanding talents and exceptional prospects to climb to the top of Zenith Online dismayed his superiors.

They invoked their influence to suppress his uprising, ultimately causing his demise. However, rather than perish, Kieran Silver receives a second chance.

A chance to dethrone one of the top 10 guilds, Golden Brigade. An opportunity to create an immortal legacy that would forever live on in players' minds. The ability to reach the zenith in both worlds!

However, as he is reborn, Kieran notices a few things that are different from what he remembered. Could it be that he has gone back in time, or is there an even deeper explanation and a larger power at play?

These questions will be answered, whether forcibly or inadvertently, as Kieran explores a seemingly driving force.

The advent of the Legendary Berserker begins!

“We live in a world of gliphs. The left arm chamber, right arm chamber, left leg chamber, right leg chamber, wind chamber and the heart chamber. These are the six chambers of gliph that represent a glipher’s quality.”

In his previous life, he was the best metalsmith on the continent; even the most powerful fighters came to him for weapons. He was no doubt a powerful man, but sadly, his incapability to retaliate left him at the mercy of others.

Chui Yim, once dead, reincarnated into the world of gliphs, accompanied by Heaven’s Flame. However, the violent introduction of Heaven’s Flame crippled his heart chamber.

Born with a heart deficiency, he was unable to perform strenuous exercise, let alone engage in physical fights. As such, his father who worked as a doctor made him study hard and sent him to the Riding Clouds Academy, where he met a close friend who was escaping from his family’s mu*derer.

Determined to write his own destiny, Chui Yim vowed to break limits and take up the path of a cultivator.

After being given up on by his family because his dantian was destroyed, Soh Woonhwi was kidnapped by the Blood Cult and lived as a third-rate spy.

One day, he died while being used to find a legendary sword immortal’s secret records. However, he returned to the day he was kidnapped ten years ago and obtained a mysterious ability that allowed him to hear the voice of swords.