(Cover Art not mine) So this is a supernatural x Gravity falls crossover yayyy I don't see enough of these soooo- This is a Bill Possession Pine Twins au where both twins are under his spell? Ok! Mabel is the most deadly tho- And Dipper is the smartest! That's how it works and they talk like siblings so they have their own mind just listen to Bill! So they are under his spell- I'll have an info page love y'all~