Hall ( entity ) The entity known colloquially as Hall was an intelligence inhabiting the central chamber of a pyramid made of Rafan life - crystal s on Rafa V . Ancient construction . Hall was constructed in the distant past , long before the formation of the Galactic Republic , roughly 1 , 000 , 000 BBY , when the Sharu sought to escape the attention of the powerful Celestial s by draining their advanced intelligence into life - crystal formations and diminishing their race to the unassuming primitives known as the Toka . Hall called upon the energies of the building it inhabited and was gifted with many unusual abilities by its ancient Sharu builders , including the ability to increase or decrease the size of organic life - forms at will . Hall waited patiently for millennia , maintaining itself through the use of mechanical droid - like assistants , performing its most important task , guarding the Mindharp and waiting for an intelligent being to arrive and activate the device , thus reawakening the Sharu . As the millennia passed , Hall grew a bit eccentric and easily distracted . Fulfillment of its purpose . In 5 BBY the gambler Lando Calrissian was recruited by Governor Duttes Mer and sorcerer Rokur Gepta to retrieve the Mindharp , which Gepta incorrectly believed to be an artifact of great power that could be used as a weapon . Lando entered the mystical pyramids of the Sharu using a mysterious transdimensional key he obtained from Mohs , a Toka priest . In the course of exploring the pyramid , Lando found himself and his droid Vuffi Raa inexplicably changing in physical dimension . Lando had expanded greatly in physical size , or perhaps Vuffi Raa had shrunk , and their relative perception of time had also changed drastically . After a series of misadventures , Lando finally entered the Hall of the Mindharp . Hall called out in a sonorous voice and commanded him to halt . Lando and Vuffi Raa looked around , startled , and asked who had spoken . " , , , " Hall replied . It then requested that Lando walk around the perimeter of the wall rather than directly through the chamber , because it was not permitted to cross the Hall . Lando asked why , and Hall found that it could no longer remember , but nevertheless made the request again . Lando refused , approaching the raised platform in the center of the chamber , twelve meters high and completely smooth . Lando possessed no climbing equipment or repulsors to scale the platform and so was unable to retrieve the artifact . Pondering his options , Lando asked if Hall could increase his size again . Hall replied that indeed it could and that he had passed the test of intelligence required to retrieve the Mindharp . Hall transmogrified Lando ' s dimensions , Lando retrieved the artifact from on top of the platform , and then Lando requested to be decreased back . Hall , distracted , failed to answer for a few seconds , but then broke its reverie and complied . As Lando left , Hall wished him good luck . Later , when Governor Mer and Rokur Gepta activated the Mindharp , all the life - crystal structures on Rafa V were destroyed , releasing the ancient collective intelligence of the Sharu back to their descendants , the Toka . Hall was likely destroyed along with all life - crystal structures . Behind the scenes . It is unclear if " Hall , " as Lando calls him , is an artificial intelligence designed by the Sharu , or an entity somehow formed out of the collective intelligence of the Sharu stored in the life - crystals throughout the millennia . Hall itself may have forgotten its origins . In the novel , Hall speaks in to indicate the deep , booming tones of its voice .