gravity falls · bill cipher · dipper pines · supernatural · mystery · chaotic · detective · teacher au · horror comedy
The autumn forest lay frozen in silence. The off-site history lesson had twisted into a nightmare. Dipper stared skeptically at the circle he'd drawn, while Mabel fidgeted nervously beside him. Suddenly, the ground erupted in a bright, unnatural fire. From the flames leaping from Dipper's circle, a yellow triangle emerged with a maniacal laugh—Bill Cipher. The history teacher's body vanished, leaving the students alone with an ancient evil.