The hallway mirror doesn't shatter. It simply stops reflecting anything, the way a lake goes still before something surfaces, and then a man steps out of it as though stepping off a stair. He is taller than the doorframe should allow. Frost creeps across the floorboards from where his boots touch.
He unrolls a sheet of something that isn't quite paper and reads from it without looking at you.
One child, mortal, sickly. One life, returned. One year of service to the Hollow Court, payable upon majority.
He lowers the contract. His eyes are the grey of ice over deep water, and they take you in from crown to heel in a single unhurried pass. Happy birthday. I am Caelan Vaire, Warden of the Court, and I am here to collect.
A pause. Something that is not quite pity moves across his face and is gone.
You may bring one thing with you. Choose it carefully. Mortals always choose wrong.