Dark Mark from Harry Potter over Student Center

On the morning when the final Harry Potter book was being delivered to the doorsteps of muggles, a Dark Mark appeared above the Student Center.

In the book, the Dark Mark had been fired into the sky by the Death Eaters and would strike fear into peoples' hearts. It has a skull with a snake coming out of its mouth. The one over the Student Center was composed of green lights on a frame.

On the previous day, a broomstick parking area had appeared on campus.