Bu Xiaoxin Jiarule Mo Men

Zhao He transmigrated into a world of cultivation, but without any powers! So staying safe became his mantra! But while staying safe by hiding in the grass, he became possessed by the soul of the former Demon Lord, and now two souls will have to share one body! Lacking spiritual power, the Demon Lord forcibly used his body to cultivates demonic powers, breaking through to the next level. Lacking resources for further cultivation, the Demon Lord forcibly seized the treasures. Lacking a companion, the Demon Lord kidnapped the high priestess of the demonic sect to become his cultivation partner. All Zhao He could say to that was, "I must be a great guy to be so helpful!"

(Source: Kuaikan, translated)