Clancy's Continuous Collection

You conjure an extradimensional dwelling in range that lasts for the duration. You choose where its one entrance is located. The entrance shimmers faintly and is 5 feet wide and 10 feet tall. You and any creature you designate when you cast the spell can enter the extradimensional dwelling as long as the portal remains open. You can open or close the portal if you are within 30 feet of it. While closed, the portal is invisible.

Beyond the portal is a magnificent Library with countless Isles beyond. The atmosphere comfortable and warm. Whilst in this space, creatures are driven to study and cannot benefit from any forms of rest. This is to assist in the gaining and storage of knowledge.

You can create any floor plan you like, and sort the Isles in any order. The place is furnished and decorated as you choose. The Library is staffed by 100 unseen servants, who assist occupants at their call (Ultimately controlled by the caster).They can’t attack or take any action that would directly harm another creature. Thus the servants can only catalogue new items, fetch from the current collection, or direct occupants to certain sources of information. The servants can go anywhere in the Library 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, however objects such as newly added books, trophies or texts remain (DM's Discretion) and are incorporated into the collection.