Griever swarms drift swiftly through the air and travel in small packs, disgorging void fire at their chosen prey. Though considered infernals, as they are native to the same realm, they are closer to animals or beasts. Their behavior suggests a strangely uncanny understanding of their environment and their prey as they silently coordinate to attack. They are surprisingly durable, and their mode of movement is erratic, making them hard for mortals to anticipate. Inky darkness follows them, pulled from beyond Caen, and the sight of their approach presages certain doom.