Wondrous Item, Very Rare (Requires Attunement)
This magical key is an heirloom of the Van Vonvolkvan estate. This wondrous item can only be attuned to while within the estate to which it is keyed to. While holding the key, you can use an action to twist the key, as if you were unlocking a door. When you do, a magical, spectral door slowly appears in front of you over the course of 1 minute, duplicating the effect of the magnificent mansion spell with the following change. The dwelling always matches a version of the architecture and furnishings of the Van Vonvolkvan estate. The appearance of the mansion may update as determined by the DM.
When the spell ends, the key can’t be used this way again until 1d4 dawns have passed.