Gifted Bride of the Sinned Prince - Chapter 673 Never let my daughter suffer

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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An innocent boy from Earth who was sheltered all his life finds himself reincarnated into a world full of magic, a world as beautiful as it is horrifying. Fate brings him together with his new loving mother and sister, and they face the trials together as a family. Follow their incredible story as they struggle to survive and create a better life for themselves.

“...is that the end for me?”His eyes closed, accepting his fate. He thought it was the end. However, it was not.When Liam awoke from the endless darkness, he found himself in a world much different from his own―and in a body that was unfamiliar.“...[ The Golden Hero ] This is...”It seemed that he was given another chance at life. No longer as Liam, but as Rowen, a character from a novel.But, there was a slight problem.Rowen was a villain. A secondary villain at that.His fate was to be manipulated by the antagonist and killed by the hero.It was a tragedy. What could he possibly do?Of course, not wanting to let fate decide for him again, he took up his arms, stopping at nothing to prevent his tragic death.He had to survive in a cruel world where fate was not in his favour.If it meant killing the protagonist, the crown prince or even the main villain; he would do so.All so that he could live the life he wants.

-Welcome back home~Shall we start with a bath today, or eat first?-Isn't there a third option?-Nope, so let's eat first. I made omelette rice today.-Speaking of omelette rice, there should be that 'maid magic', right?-I really can't handle you... moe moe kyuu~ make it taste good~ moe moe chu~-And what about a heart with the fingers?-I'll give you a head with my heart!The maid finally lost her patience and slammed the omelette rice onto Lin Shuang's head.Lin Shuang: That feels better.