Yun Xi transmigrates into the world of cultivation and wakes up to a hellish situation from the start: a spirit-selection ceremony in the sect's sword grave, watched by everyone. By the rules of surviving after transmigrating, she should have aimed for Lin Feng, the brilliant senior disciple with an air of effortless grace, and latched onto his old sword to cultivate in peace. But her hand slips, and her drop of blood hits the wrong target: a charred, scrap-metal-looking sword trapped beneath chains of ten-thousand-year-old black iron!
Her gentle senior disciple advises her to abandon it. “Junior Sister, this thing is vicious and can do you no good. You should cut your losses.” But the “scrap metal” brims with murderous energy, its demonic voice drilling into her mind: “You little weakling, you disturbed my eternal slumber and now you think you can run?” Forced to sign a “contract of servitude,” Yun Xi becomes the exclusive scabbard of a sharp-tongued Demon Venerable, who torments her day and night as she climbs from Qi Refining to higher realms. Other people rely on talent to master the sword. She relies on the Demon Venerable's death threats: “Get that move wrong again, and I'll chop off your hand and feed it to the dogs!”
At long last, she grinds her way to the Nascent Soul and Spirit Transformation realms, thinking she can finally catch her breath. Then the immortal-demon war erupts. She stands guard over her sect with her sword, only to see the charred strip of metal behind her unleash a towering aura of fiendish energy and transform into the supreme ruler of the demonic path, gazing down on a million troops. Ahead of her stands the gentle senior brother she has always trusted, holding the command of the immortal sect, his smile unchanged. “Junior Sister, for the sake of all living beings, it's your turn to sacrifice yourself to destroy the demon.”
Yun Xi: “...” Is there still time to break the bond? When she got bound to him, nobody said this was a deadly question of mutual devotion.
