The Cursed Extra: Bloodline of Sacrifice - Chapter 97: Boredom in C Rank portals

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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Nolan transmigrated into the Marvel universe and became a researcher at Hydra's lab.He awakened the talent of the “Master of Research,” allowing him to perceive and comprehend all truths and knowledge. His body harboured the power of the Spirit of Evolution, capable of absorbing everything to enhance his strength!From the very start, he developed the Super Soldier Serum and that was only the beginning.By studying various extraordinary individuals, he unlocked their abilities and seamlessly integrated them into himself.“I will use science to recreate the gods of Earth and bring Superman into the Marvel universe!”Wolverine's healing factor?“Wolverine, you've already been dissected once. One more time won't hurt!”Super strength? “Hulk, don’t leave!”An iron body? Heat vision? The power that grows by absorbing sunlight? “X-Men, stop right there!”He will make the Ultimate version of Superman!

This is a story about Gong Lixin who was the young master of an ancient underground palace in the ancient times. He was raised by his master and forced to partake sexual relationships with numerous people to cultivate his Yin Body. His master who has a Yang Body was going to absorb him after he has reach a level to become stronger. MC refused and killed his master also dying at the same time. Then he transmigrated to the modern time and thinking he will enjoy peaceful life, the end of the world arrived.