[ Castiel's message begins as almost a solid block of static before he manages to orient his tablet's camera in a more useful direction, thanks to the number of shadowy figures around him and the now constant distortion and artifacting that now follows his face whenever he tries to record himself. His voice, at least, comes across as clear as anything. ]

In light of recent events and revelations, there's something important I want to share with the rest of you.

[ He fumbles with the tablet for a moment, turning it so the camera is focused on a series of complex geometric symbols drawn in chalk on a nearby wall. ]

These are warding sigils. Some of them are meant to repel evil spirits. Others are for purifying ones that have been trapped against their will. Some have more esoteric purposes. I've been leaving them in the thresholds and near the windows of buildings as I pass through them. I think it might be a good idea for others to do the same, especially in areas where the ghosts are very active. We may be able to do something for them.

[ Though he doesn't sound terribly sure of himself, even as he says it. ]