Mordenkainen's Magnificent Mansion

Mordenkainen's Magnificent Mansion is a 7th level Conjuration spell that conjures a dwelling within a pocket dimension.

Description
This spell allows the user to conjure an extradimensional dwelling that lasts for 24 hours. The entrance shimmers faintly and is 5 feet wide and 10 feet tall. The caster and any creature they designate when casting the spell can enter the extradimensional dwelling as long as the portal remains open. The portal can be open or closed if the caster is within 30 feet of it. While closed, the portal is invisible.

Beyond the portal is a magnificent foyer with numerous chambers beyond. The atmosphere is clean, fresh, and warm. The caster can create any floor plan they like, but the space can’t exceed 50 cubes, each cube being 10 feet on each side. The place is furnished and decorated as they choose. It contains sufficient food to serve a nine-course banquet for up to 100 people. A staff of 100 near-transparent servants attends all who enter. The caster decides the visual appearance of these servants and their attire. They are completely obedient to their orders. Each servant can perform any task a normal human servant could perform, but they can’t attack or take any action that would directly harm another creature. Thus the servants can fetch things, clean, mend, fold clothes, light fires, serve food, pour wine, and so on. The servants can go anywhere in the mansion but can’t leave it.

Furnishings and other objects created by this spell dissipate into smoke if removed from the mansion. When the spell ends, any creatures inside the extradimensional space are expelled into the open spaces nearest to the entrance.

Notable uses

 * Scanlan's Magnificent Mansion was often used as a base of operations by Vox Machina.
 * Widogast's Nascent Nine-Sided Tower, a spell created by Caleb Widogast to create a massive tower, is seemingly a flavored version of this spell. The main difference is the enormous size of the dwelling.