Infinite Return System: My Sister-in-Law's Cultivation Aid

Zhao Wuxie wakes up in a stranger's body facing an impossible demand—sacrifice his supreme bone for unrequited love. But he's no fool! When a mysterious Infinite Return System activates, every gift he gives multiplies back with divine rewards. Supreme bone gifted? Receive legendary double pupils! There's just one catch: recipients with ill intent trigger a karmic backlash, draining their luck and empowering him instead. As enemies fall to heavenly tribulations and allies grow stronger, Zhao Wuxie discovers the true power of strategic generosity—and his sister-in-law becomes his most unexpected…