Manor Key

This long key, studded with tiny Siberys dragonshards, can only be used by a creature with the Mark of Hospitality. You can use an action to trace the outline of a door in the air with the manor key and cast Mordenkainen's magnificent mansion without requiring material components. The spell ends after 24 hours or when you use the key to lock the door and dismiss the effect; at that time, any creatures within the mansion expelled into an open space near its entrance. Once used, the key cannot be used again until the next dawn.