Passive Cultivation of Techniques: Training to Become Buddha in a Demonic Sect

Novel Summary
Introduction:
Lu Li passed through and became an introductory disciple of the Demon Sect, with a martial arts system attached to him.
Any exercise can be practiced on its own once learned.
but:
“Because your blood-devouring magic power did not draw human blood, you were depressed and your cultivation regressed.”
“Your bones have broken the palm of your heart. Because you only kill chickens, ducks and fish, you are not satisfied, and there is no progress in your cultivation.”
“Your Qishaquan is very dissatisfied with your kind heart, and your cultivation is backward.”
“Your spirit ghost shadow step, because there is no fusion of the ghost power, the energy is insufficient, and there is no progress in cultivation.”
…
Looking at the system prompt, Lu Li had no choice.
So, he began to practice the right way exercises in Demon Sect.
– Description from readMTL