Soul Slayer Chronicles is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Jiang Xiaobai, a sickly youth, ventures into the mountains in search of medicine. Through a series of twists and turns, he unexpectedly becomes a menial servant in an immortal sect. Accidentally acquiring a mysterious black sword, he carves out a unique path of cultivation. By slaying demons, he refines their souls, swallowing mountains and rivers, yet tainted by their allure. By slaying alchemy cultivators, he concocts pills in sacred cauldrons, possessing the miraculous ability to restore life. By slaying scholars, he crafts talismans with his hands, transcending the ordinary. By slaying Buddhas, he purifies heaven and earth, untouched by worldly dust. From then on, Jiang Xiaobai soars to the skies, even the forbidden zone’s great demons willingly acknowledge his dominance. Even the sect’s venerable ancestors, humbling themselves, bow to him as their master…