Shini Yasui Kōshaku Reijō to Nana-ri no Kikōshi - Chapter 120 - Seven Wonders of the Academy (part ten)

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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Skyler's story was typical. He was publicly labeled a waste with no future as a Light — awakened individuals capable of wielding elemental powers. He thought that would be the end of it. But no, apparently that was not the case.He was teleported to the 'Battle Royal' to fight, even though he had zero powers and his age and potential were 100% ineligible!To make matters worse, he was not even the protagonist or transmigrator! He was just a freaking side character destined to die young in the story! And his death served only one purpose — to bring his sister closer to the protagonist!What a pitiful ending, right?However, unbeknownst to all, he wasn't meant to die but to become the best in two other realms, and they had altered the fate of that powerful King. Yet, there was a tiny problem — he didn't remember how he became overpowered in his past.

Year 2056, in a city in the Yuan Jiang Su Jin area. On top of a ruined, shattered six story residential apartment sits a teenager wearing a combat vest, militaristic trousers, and alloyed battle boots. On his back is a hexagonal shield and equipped is a blood-shadow battle knife. He sits there silently on the edge of the roof. At this time, the sparkling sky was shining and there was a refreshing breath within the air that blew towards him. However, there was only silence within the ruined, deserted city, with an occasional howl that makes your heart skip a beat.

- Description from novelupdates

Wu Ping transmigrated into the world of immortal cultivation and became a disciple of the outer disciple of the Blood Rain Sect. With his qualifications, he was confident that he could lead a peaceful life.But, who would have thought Wu Ping’s sea of consciousness was connected to a zombie world?What was more outrageous was that the zombies actually had living souls.The zombie’s corpse can be used to refine and improve his cultivation.Its blood can be used to refine the blood flame technique, and its soul can be used to enhance the soul-refining technique.Its crystal cores can also strengthen the human body and awaken psychic abilities.Soon, the zombie world became Wu Ping’s backyard for cultivation techniques.[Eternal Demon Green Art: It uses half-souls to condense tree species. It must be provided with blood and corpses as nutrients. The more nutrients it absorbs, the more powerful the Eternal Demon green tree will be, and the stronger the spiritual Qi it will generate] Wu Ping directly planted the magic green tree in the zombie world, with corpses as nutrients.In no time, all kinds of terrifying demon cultivation techniques shone under Wu Ping’s hand one by one.The entire immortal cultivation world trembled for him, calling him the ‘Immortal Devil’.But Wu Ping didn’t kill anyone. All he killed were zombies.A group of righteous cultivators: “You, Immortal Devil, don’t come over ah!”