Doraemon, Use Katyusha!

"Fellow Taoist, times have changed!" Huang Baiwan accidentally obtained a mysterious iron box - it contained not a flying sword talisman, but the Demon King from ten thousand years ago! The unexpected merged with me. "Zhuxian Sword Formation? Why not try my 'Zhuxian Katyusha', and fire a volley to send you all through the catastrophe!" "The divine power is physically invincible? Try this - the 'divine tracking missile', which comes with a natural disaster lock and specializes in treating all kinds of dissatisfaction!" While traditional monks were still making secrets and chanting incantations, Huang Wanwan was already carrying psychic Gatling and driving a magic weapon tank, setting off a revolution in dimensionality reduction and strike in the world of cultivation! "Cultivation of immortality is scientific, and firepower is paramount! You are cultivating immortality, I am cultivating - the truth is only within the range!"