Fairy Tail: Collapsing Stars - Chapter 55 - Queen of Weapons

Ye Xuan is a very good doctor. Even though he is only 14-15 years, he has been learning medicine with his grandpa since he was 3 years old. His grandpa is a legendary doctor, of the Medicinal Dao Master level just one step shy of the ultimate level.

But his grandpa suddenly died after trying to cure a mysterious person with the “Hundred Evils Body” and Ye Xuan is now trying to survive together with his uncle. His grandpa left the first half of his doctor’s manual to Ye Xuan. The other half is in the hands of a former friend of his grandpa who now refuses to return it.

Ye Xuan has to become strong to retrieve the 2nd half of the manual. The first half of the manual contains a special acupuncture method which allows Ye Xuan to cultivate much faster than normal people.

When his uncle suddenly disappeared, leaving only a note with the word “flee!” on it, Ye Xuan is left on his own to survive in this world.

When Ye Xuan finally made it into a sect, he was forced to join a waning division of the sect where he is the sole student of a beautiful woman. His master…

- Description from Novelupdates

In this world, human are in peril. 72 Obelisks suddenly appeared out of nowhere, infecting the world with Monsters. Amongst this chaos, people look for hope.

A man named Basil Pacifer is the humanity's hope. He is the strongest Mage alive at that point. Sadly, he believes in no man, and he always moves alone.

...

Basil observes the unfolding scene bitterly. He is aware of his impending doom, however he has no grudge. He has lived long enough to achieve things people can only dream about.

Looking back to his past, he realized his life is nothing more than a sad story.

Closing his eyes, he accepted his end — or so he thought.

...

”Look at me! What do you see?“

”Regrets.“

”Don't you want to undo it?“

”Tell me what the offer is.“

Thus, Basil Pacifer returned to the past, being his younger self once again. Of course, he returned back with something.

...

[Ding!]

[Guide to Omniscience is successfully merged with The Chosen One]

[Analyzing The Chosen One's mental capability...]

[Analyzation Complete!]

[Result: The Chosen One is retarded]

[Initiate Brain Configuration!]

No matter how useless the golden finger he received seems, he will reach a higher height than his last life. This time, he will completely erase any regrets he has!

After an ominous prophesy is discovered, the swordsmen of the kingdom of Ensis must band together to avoid the fate that has already been foretold.

With the Legendary Mechanic System, I transmigrated to Marvel Universe to be Dr. Zola’s assistant.

With Mechanical Force Analysis, I can learn every black technology.

Winter Soldier’s arm? I built a better one for you.

Iron Man’s armor? I already made it a decade earlier.

Doc Ock’s tentacles? I am the one who provided core technology.

Hulk’s mutation? Sorry, I was there and got hit by the radiation too.

As for a certain purple potato, can he collect all Infinity Stones?

……

However, I only had one simple ultimate dream. That is to go home…

- Description from Novelupdates