My Villainy Makes Heroines Fall for Me?!

I transmigrated as Tang Xin, the Xuanling Sect's chief villainess, destined to be brutally murdered by the heroines I’m supposed to torment. My only goal? Survive! I planned to butter them up, change my evil ways, and maybe even befriend the future Sword God. But a sadistic System appeared, forcing me to continue my villainous role! Every 'good' action deducts cultivation; every act of cruelty rewards me handsomely. Especially when it involves humiliating the heroines, like calling them a \"piggy\" or smacking them. The problem? The more I insult, bully, and 'dominate' them, the more the heroines seem to... like me? Why is the future Sword God looking at me with devotion, and why are more powerful beauties flocking to my side? Am I being a villain, or a misunderstood romance expert? And how long until my accidental reverse harem gets me killed?