I Want to Ride the Wind to Immortality, With Boundless Magic

After ten years, the System finally awakens. As long as there is enough desire, anything can be exchanged. Yun Xi encounters one bizarre incident after another, such as eerie knocking at the door in the dead of night, followed by someone climbing into bed to offer warmth; and the fact that human-faced hounds are actually born of humans. Thus, when the System detects that the Host's fear level has reached 100%, it activates a mission. [She goes to the entrance of the Ying-Duo Society and burns the scarecrow inside the cave entrance. She successfully obtains a card bearing the spell "Myriad Souls Talisman." Once the talisman paper appears, it claims ten miles of territory and causes all living beings to fall.] [She slays the human-faced hound in the back mountain and successfully obtains a card bearing the name "Human-Faced Hound." Once the hound devours a person, a beautiful human face appears, allowing it to change into a thousand forms.] … Strangely, every time Yun Xi faints, the area around her becomes deserted and not a blade of grass remains. She initially assumes that the System has malfunctioned and that she has lost her mind. That is, until she learns that she has been parasitized by the thousand-year-old demon immortal Xuan Chi, who has gained opportunities along the way by sacrificing his clansmen, friends, and lovers. Instead, she becomes even more excited. "When I become an immortal, everyone becomes an immortal."