MTL - Mystery Descends: My Exchanges Are Not Equal - Chapter 763 , 4 poles and 2 barren! Dragon revival!

[You have entered the dungeon at Gwachun Station’s 1st Exit.] When former high school student Kang Woojin finds himself returned back to Earth after being forcibly summoned to a foreign planet for 20 years, he soon finds that Earth is not the same, normal place as he once remembered it to be.

When an era came to an end, various forces set foot in cultivation to compete for immortality. A young boy who spent most of the time sleeping got lucky in the troubled times and became an unparalleled immortal who could cover the sky with a snap of fingers. Was he going to live forever?

- Description from Novelupdates

In the twenty-seventh year of Hong Guang, the allied forces of seven nations invaded the Great Blue Dynasty.Rifled muskets, mortars, and armored vehicles combined into a steel tide, were ultimately shattered by the Great Blue's armored cavalry.Muscle, magic, firearms, cannons... the new and the old powers continuously collided.In an era of great strife, Li Fei, with the help of a Ten Thousand Blood Bead, gradually became an existence akin to a BOSS:'Is this the extent of your damage? You haven't even taken off one-thousandth of my health.''You don't think this is enough to kill me, do you?''Don't rush, the second phase is up next!'......

Lin Dong, who has mastered both the divine medical arts and martial arts, has traveled from the mountains to the city.With divine medical arts in his left hand and unbeatable martial arts in his right, he roams freely in the city.