Fanfiction of *Covering the Sky* and *Lord of Mysteries*. Lord of Mysteries: Reader's Path, starting at Sequence 7, relying on the bizarre abilities of the Lord of Mysteries world, invincible in the *Covering the Sky* world. You inherited the supreme emperor's scriptures? Thief's Path, stealing thoughts, stealing the emperor's scriptures, the secret realm hides the elixir of immortality? See if it's the one in my hand. You have a sacred artifact, an emperor's weapon? Steal it without hesitation!

A mystery fanfic, following the path of an assassin. An unexpected transmigration to the world of Lord of Mysteries. Becoming a born half-Sequence Nine 'Assassin'. Initially believing he could live a carefree life thanks to his 'noble' inheritance, he is forced to be named 'Countess' at the start.

[Mysterious style + high-tech doctor + invincible scalpel + decisive killing + mechanical pet]

Having traversed a mysterious world, Arthur Beria landed in the peaceful and simple city of Dilis. He discovered that his mind wasn't filled with those maddening ramblings, but only with lines of cold, hard data.

To others, it was the indescribable whisper of an evil god, a runaway mutation that meant certain death. To Arthur, it was merely a series of medical records awaiting processing: "A lurking vengeful spirit? Hmm, a neurological parasite, electroconvulsive therapy recommended." "An out-of-control Extraordinary? This is malignant proliferation caused by genetic mutation, cut it off." "Contamination by an ancient god? Oh, this is a high-risk virus, requiring planetary-level isolation surgery."

Thus, in this mad world where steam and mist intertwine, a black market doctor emerged, inspiring fear in all who beheld him. He wielded a scalpel, accompanied by a vicious mechanical dog that fed on corpses. Even a god descending to earth would be forced onto the operating table to sign an informed consent form if they dared to display their health bar before him.

Arthur adjusted his monocle and looked at the trembling evil god: "Don't move, it's just a minor surgery, it'll be over soon."

— This book is also known as: When Outer Gods Meet Surgeons, As Long as I Can't See God's Name, God Cannot Contaminate Me, and About My Removal of the Old Ones as if They Were Viruses

A time traveler who is familiar with the plot; a sequence watched by the hidden sage; the gaze cast by the Lord of Steam; a head full of memories that will lead to pollution; and a time gem that comes with it; let's see how much influence this hereditary marquis' son can bring to the mysterious world!