The ominous Valley of Extinction existed on the enigmatic Wellspring of Life, a world believed to be the origin of all life and midi-chlorians.
This valley had the power to generate mirages of individuals dear to anyone who dared to traverse it. These illusions were designed to manipulate emotions and attachments, tempting travelers to remain within its confines. Only those possessing the strength to relinquish these emotional bonds could successfully navigate its treacherous path.
In his pursuit to uncover the secrets of immortality, Yoda, the Jedi Grand Master, journeyed through the Valley of Extinction. The valley manifested initially as a corridor within the Jedi Temple located on Coruscant, populated by the inert forms of deceased Jedi who were dead. Subsequently, it presented a more appealing vision: a Jedi Order unscathed by the devastation of the Clone Wars, an illusion that Yoda swiftly recognized for what it was.