After Becoming a Good-for-Nothing, I Became a God with Ancient Spiritual Essence

The modern female lead does not transmigrate by accident or from the womb. Instead, she transmigrates through a sacrificial binding to an ancient book. A graduate student specializing in cultural relic restoration, she is drawn in by the vestiges of ancient spiritual energy within the lost text, The Lost Scrolls of the Mountains and Seas, while restoring it. Her soul is forcibly fused with the body of a good-for-nothing girl from another world who has just been abandoned and left for dead by her family. The two souls enter a symbiotic state rather than one completely devouring the other. They share a body, can switch control at will, and share memories and perceptions.