[ Castiel nods along because however loathe he is to admit it, House is right. If he tries to fight this impostor on uneven ground that he can't even see in the first place, he's more likely to hurt himself than actually accomplish anything. ]

It has four faces, all eight feet above the ground. They look in all directions - once we are no longer blocked from its sight by an obstacle, there will be no hiding from it. Only one mouth has the light at a time, but it passes it between each one in sequence.