Mortal: I Asked You to Guard the Abandoned Library, but You Secretly Became an Immortal

Lin Yan was originally a handyman disciple of the Yuntian Sect, but unexpectedly received a worn-out thick pen because the outer sect elders tampered with his promotion to an outer sect disciple. From then on, an evil genius who combined the strengths of hundreds of schools was born. Is the knowledge of alchemy complicated? I, Lin Yan, know the pharmacology of single prescriptions by heart! The formation is extremely mysterious? I, Lin Yan, have a stroke that can make thousands of complex formations simple! Is the practice method esoteric and difficult to understand? I, Lin Yan, have a stroke that can enable me to comprehend the supreme Tao in an instant! … Some years later! Lin Yan held a pen to point out all living beings, and finally wrote a line of words in the sky: In the eternal night, only the great road is eternal!