Everyday, Boss Is Pretending To Be Weak - Chapter 41.1 - The Young Master comes to the rescue (1)

I accidentally changed the whole world, the resurrection of the dead, genetic variation, recovery of the qi, mountain and seas reborn, land and seas expanded and evil spirits have started to appear.

Ghosts are now commonplace. Some people now have three heads and six arms. Some people have obtained martial arts techniques and ordinary people are now just cannon fodder.

Fortunately, I have acquired an ability which can make various items mutate.

books into martial arts or cultivation manuals,

fruits into precious treasures of heaven and earth or poison that you can only imagine and…

weapons, that can split the earth or gain sentience!

- Description from Novelupdates

Yang Gang accidentally became the imposter heir to a wealthy family, with a beautiful older sister and a twin younger sister at home...

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

Traveling to an overhead urban world where martial arts and immortal arts coexist, the only thing Lin Shen can rely on is the avatar Golden Finger.

Cultivate in avatar, the main body becomes stronger.

Clone [Pure Yang Body]: Yang attribute skills training speed +300%, Blazing Sun Palm, Melting Soldiers Hand, Qianyang Sword Art… Any Yang attribute skills can be easily mastered, and a thousand miles a day!

Clone [Natural Dao Body]: Practice speed +500%, all martial arts skills can be understood at a glance, mastered, and crushed all geniuses!

Clone [Sword God Wuwo]: The power of swordsmanship skills +200%, the speed of swordsmanship skills training +200%, let you be tyrannical, I will kill you with one sword!

 …

“You never know how many avatars are working hard behind the person chatting with you in front of you!”

“The avatar did it, what does it have to do with my body?”

“What I’m most afraid of is that others will bully the few with the more, anyway, not as many as me!”

- Description from novelbuddy