A series of strange events has Sam and Dean Winchester present for the final battle of Hogwarts. Who is responsible for them being there? Why are they there? Do they help or do they kill everyone? A/N: This is my first crossover, it is set after S11. Mary was not brought back, and MOL does not interfere. Timeline will be modified to fit plot. No pairings as of now, may change later. Rated M for language, gore, and violence.