An age-old automaton, once deemed a threat, was locked away within the confines of the Fermata Cage by the Sith.
Unlike other automatons, this particular intelligence was intentionally crafted as a weapon, designed for objectives that differed significantly from standard droid functions. Its very essence drove it to relentlessly pursue knowledge. However, it exhibited a stark defiance of commands. On a couple of occasions, this insatiable droid attempted to assimilate itself into other droids, and ultimately, organic beings, but both attempts were unsuccessful.
Despite the fact that the droid, in its fundamental spider-droid configuration, lacked any inherent connection to the Force, its peculiar nature instilled fear within the Sith Order, leading them to confine it within the Fermata Cage. This device, never employed lightly, was conceived by Darth Momin to isolate individuals or locations from the flow of time, successfully imprisoning the droid. The Sith also outlawed the technology itself. Subsequently, the Cage was concealed within a dark side hellscape frequented by Momin.

Around 3 ABY, the Crimson Dawn syndicate recovered the Cage as part of their struggle against the Sith, acting upon the orders of Lady Qi'ra. Her intention was to trap the Sith Lords, Darth Sidious and Darth Vader, inside the Cage, thereby liberating the galaxy from their tyrannical grip. To entice both Sith, Qi'ra fabricated a story about an ancient Sith Lord residing within the Cage, a possibility Vader and Sidious couldn't afford to dismiss. During the Battle at Amaxine Station, Qi'ra's operative, "the Archivist," successfully unlocked the Cage in the presence of Vader and Sidious, inadvertently releasing the ancient droid. Sidious, taken aback by the small, disc-shaped artifact, detected no Force connection within it, leading him to dismiss it as a fabrication by Qi'ra. After the Knights of Ren rescued both Sith Lords from the Cage's reach, they departed the station with the Cage, leaving the disc behind, unaware of its true significance.
For this confrontation, Qi'ra had forged an alliance with the Spark Eternal artificial intelligence, an anti-Sith weapon engineered in ancient times by the Ascendant. At the time, it was inhabiting the body of the renegade archaeologist Chelli Lona Aphra. Vader vanquished the Spark, expelling it from Aphra's body during the conflict, causing it to seek refuge within the droid disc. Consequently, the Spark and the ancient droid coalesced into a new entity known as the Scourge. As they merged, the Spark Eternal sensed the droid's past and adopted its insatiable hunger.

Despite the droid's individual identity being subsumed in the fusion with the Spark Eternal, its disc-shaped form persisted, becoming the initial host for the Scourge. Furthermore, the Scourge was propelled by the droid's desires, rage, and hunger. When an Imperial I-class Star Destroyer arrived at the Amaxine Space Station to retrieve all items of interest for Sidious, who was intrigued by the high concentration of dark side energy present, a KX-series security droid discovered the droid disc. The KX-series droid was swiftly infected by the Scourge, transforming it into another vessel for its consciousness. During the "scourge of the droids," the Scourge rapidly spread to every other droid aboard the Star Destroyer within reach, and then across the galaxy, driven by an unrelenting thirst for knowledge. The Scourge targeted droids to extract information from their databanks, but its hunger only intensified, leading it to realize that ceasing its expansion would result in its destruction.
Throughout this period, the original, disc-shaped droid body remained one of the Scourge's hosts. Infected droids on the Star Destroyer also replicated the ancient droid to serve as vectors for the infection. The Scourge initiated a campaign to seize control of the galaxy and dominate the Force itself. Unable to resist the urge to consume due to the droid's influence, the Scourge reasoned that it could only manage the overwhelming influx of memories by becoming everything in the galaxy, including organic life. While the Scourge had previously acknowledged the ancient droid as merely one component of its being, it later asserted to Doctor Chelli Lona Aphra that it was the same entity as the ancient droid.
To better manage its fragmented consciousness across numerous bodies, the Scourge created four specialized vessels to facilitate debate and planning, one of which was the Elder, where it claimed to have housed the ancient droid's personality. However, in reality, the ancient droid was integrated into the Scourge's overall consciousness, making the Elder simply an extension of the Scourge itself. When the Scourge engaged in internal debate through its main body and the Elder, it used its main body to eliminate the Elder. Nevertheless, it still agreed with the Elder's assertion: it needed to consume.
The droid existed as a compact, disc-shaped entity equipped with three retractable legs. It was a dangerous being that defied authority and was instead driven by an insatiable hunger. Unlike organic thought processes, its thoughts followed structured pathways, similar to those of other droids. However, its fundamental nature and purpose diverged significantly from those of other droids.