SSS-Rank Slap Skills Turned Me Too OP - Chapter 26: Brother…?

“Mu Yingying,” or the Seventh Young Lady of the Mu family, vividly remembers the cruel past life she endured.Due to the evil schemes of her stepmother and half-sister, the three descendants of the Mu family met tragic ends...The eldest son died dishonorably, the eldest daughter became mentally deranged,And she, the second daughter, was unjustly sentenced to death!Even her own father heartlessly cast his children aside...Now, she has returned once again, to the third year of the Xingping era, when “Mu Yingying” was only 5 years old.She has come back to the starting point of everything!Very well... She will drag the traitors down into the depths of hell.Her return is not for forgiveness... but to reclaim what is rightfully hers and to exact retribution on those who wronged her!“Death is not the end, but the beginning of the regret you will face.”

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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This novel is also known as I Wanted To Be A Good Person Once

Travel to a dangerous world with all kinds of strange abilities, calamity creatures, and Noble Phantasms of doom.

Fang Ze just wanted to awaken his extraordinary abilities, be an ordinary detective, eat royal food, and live a good life.

But he found that he was involved in a huge conspiracy from the moment he crossed…

Strange abilities and treasures include: mushrooms that can be planted on the body to keep youth forever; clowns whose IQ decreases and strength increases every time a clone is divided; shabby statues that cause black rain in the region when they are born; Ancient coins that will be possessed; substitute earth spirits that can learn and exercise on behalf of the master, and double the effect, etc…

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There are already three copies of ten thousand orders and high-quality works, all of which are completed normally with several million words, and will be updated continuously during the update period. Character guarantee, read with confidence.

- Description from novelbuddy

Transmigrated to the world of Demon Slayer, only to become a swordsmith?“Then I'll forge the strongest Nichirin Blade!”With each hammer strike against the iron ingot, a notification appeared...[Impurities -1]After a hundred refinements, another notification...[Constitution +1]Upon completing the weapon, a final notification...[Current Weapon Sharpness Level: 1][Forgemaster: Strength +10, Constitution +10, Agility +10, Speed +10][Reward: Sun Breathing Technique!]“Maybe... I should become the strongest swordsman after all?”