Can you recommend a novel similar to "I Have a Doomsday City"?

In a world entrenched by monsters filled with myriad factions, state disputes run wild. Amid these troubling times, martial arts have come to prominence and prosper. Xu Ning transmigrates to this world with a Martial Arts Panel and becomes an ordinary villager. He only has one goal in mind: to become a master of martial arts. Spend three energy points to level up Gale Knife Technique? Yes/no Yes! Hell yes!

Who could have guessed that the accidental discovery of a pitch-black USB drive would one day turn Chen Chen’s world upside down? He quickly realizes that this was no ordinary USB drive—and it came with mysterious powers, along with its own hidden rules. Equipped with his skills and intellect as a student of biological science, Chen Chen strives to uncover the limit of the USB drive, and the limit of his own ambition. Follow Chen Chen in his pursuit of lofty aspirations—wealth, immortality, and otherworldly powers! It is a path that will lead him to a grand plan, one that will change the fate of humanity forever…

A chance to change, challenge destiny, make dreams a reality, and live a legend! A regular man gains a system that allows him to turn into a fish! In the modern world, a young man gains an unconventional system that gives him the power to transform into a fish! With this strange power, he shoots for the stars!

# afk Ning Shi, a man from Saturn, accidentally downloaded a game on his phone called the Age of All. “Beep! Clone successfully created!” Ning Shi received a clone in the game. Whenever his clone got stronger, his real self would get stronger as well. “Your clone has trained in the training room for 12 hours. Vitality +1, Mentality +1.” “Your clone has slain the Earth-Dragon. You have received the Earth-Dragon Bloodline.” “Your clone has consumed the Charm Fruit. Beauty +10.” His clone started to conquer the game, created his own faction, and left a legacy. “Your clone has successfully won the heart of Alice the Rose Duchess. Alice will be arriving in your world shortly. Please be mindful of your surroundings.”

Tang Zhen transmigrated to an apocalyptic world, where humans struggled to survive in various buildings that they built because the ground was covered in lethal dangers that were invisible to the naked eye. Tang Zhen transmigrated along with his mutated cell phone that was packed with miraculous applications. There were all kinds of cities – some could fly in the sky, some could submerge into the ocean while some could become invisible – and shocking secrets were hidden within them. The power of Tang Zhen’s city was… He established a city and quickly leveled up his army with speeding tools. Then, he dominated this alternate world by seizing other cities. He sat at the very top. Beneath his feet was a vast floating city guarded by dragons and surrounded by angels. Countless cannons were also set up at various corners of the city. A million miles ahead, in the depths of the ocean, there was another city as large as a continent awaiting his conquest.

After 6,000 years of development by the immortal sect on Planet Earth, all of the leyline spiritual energy was controlled by the country. They only released enough spiritual energy for the cultivators to breathe. If a cultivator wanted to use the spiritual energy to train themselves, they would have to pay the immortal sect for that. Chen Mobai was a senior high school student at the Fifth High School of the Immortal Sect. He was studying for his entrance exam at the colleges of the immortal sect. His biggest dream was to achieve the Foundation Establishment Realm until he was transmigrated to a cultivation world. “There’s no one here despite how dense the spiritual energy is?” “Wait! Isn’t this the legendary spiritual herb? Are these not extinct here?” “Huh? Is this the method to extract one’s Spiritual Root? Also, isn’t this a divine technique?” “What a powerful cultivator! Please accept me as your disciple!” As his life in the cultivation world continued, his dream changed.