I Have an Immortal-Refining Gourd

[Mortal cultivation + no System + no transmigration + slow burn] Cultivation levels: Qi Refining, Foundation Establishment, Golden Core, Nascent Soul... Ancient legends tell of gourds in this world that possess divine powers. Whoever obtains one can rend the heavens and earth and command the winds and clouds. Divine gourds can: Move mountains, swallow seas, and refine immortals! Split the heavens, cleave the earth, and slay immortals! Reverse yin and yang, overturn the universe, and kill immortals! Jiang Zhen accidentally stumbled upon the Immortal-Refining Gourd, setting him on his path to immortality as an ordinary man.