I Became the Villain's Cheat and Reformed Him

What's worse than transmigrating into a novel? Becoming a jade pendant stuck on the tyrant villain's waist! Now I'm forced to nag him daily—stop massacring innocents, quit scheming against the hero, please try basic human decency. But my lectures are backfiring: his obsessive gaze keeps lingering on me, and I'm starting to suspect he's falling for his own magical artifact. My only escape? Accumulate enough positive karma to reclaim my human body before this possessive villain discovers I'm not just a pretty trinket.