There's a Horse. It wanders around the school but you never see it unless it wants you to. It's got dark eyes that make your protections feel like useless trinkets, and a fine black coat like silk to the touch. No one talks about the Horse. It's best not to. If you see it, you just quietly compliment its coat and give it a gift (it prefers sugar, candy will do) and it'll vanish when you look away. It's still there, you just won't see it any more. Don't climb on its back, no matter what it says.