Saint! You don't want to see the fall of the Heavenly Demon Sect, do you?

Story of: Saint! You don't want to see the fall of the Heavenly Demon Sect, do you?【Villain + System + Fantasy Imagination + Multiple Female Protagonists + Explosive Plot + Decisive Killing and Not a Saint + Old Six】 After traveling to a fantasy world, Qin Tian became an inner disciple of the Heavenly Demon Sect, thinking he could survive for a while. However, he discovered that the leader was the mortal enemy who killed his entire family, and that he would seize his body in three days. His situation suddenly became worrying. Fortunately, the super villain system arrived as expected! Do bad things or complete tasks to get rich rewards? Qin Tian: "Bad things? What bad things? I never do bad things!" "Leader, go with peace of mind, I will take good care of them for you!" "Ding! Congratulations to the host for completing the task and obtaining the ancient magic technique: [Dao Heart Demon Seed]" [The introduction is weak, please move to the main text! ]