Force psychosis

Force Psychosis was a dangerous mental disease that began affecting several young Jedi in 43.5 ABY, though Seff Hellin was believed to have contracted the disease before 42 ABY. The disease caused mental deterioration in the individual's brain which manifested itself as a belief that everyone the person knew was an impostor. This belief quickly turned into paranoia as the victim was unable to trust anyone they encountered. The only individuals the victim did not see as an impostor were those who were also suffering from the same disease. This disease had no known cure.

It was noted by Cilghal, Grand Master Luke Skywalker, and his son, Ben Skywalker, that the Jedi who developed this psychosis were able to display Force powers that Jacen Solo had learned, but the affected Knights couldn't have learned themselves. This proved to be incorrect, however, as Bazel Warv showed the ability to alter the density of matter, an ability that Jacen never had.

History
Symptoms of this Force disease first began to manifest in Seff Hellin, who was later captured by Darkmeld so that Cilghal could study the disease deep inside the Jedi Temple on Coruscant. Other notable Jedi affected were Valin Horn, who, after a long hunt, was frozen in carbonite to end his psychotic rampage; Valin's sister, Jysella Horn, who was imprisoned by Chief of State Natasi Daala; Natua Wan, a Falleen who was apprehended by Jedi Knights Jaina Solo, Leia Organa Solo, and Radd Minker.

After studying Seff Hellin's brain Cilghal discovered that Seff had been experiencing dreams while awake. Additional research found that the symptoms of the disease could be lessened if the victim was 'cut-off' or 'isolated' from the Force for extended periods of time. This revelation led some healers to suggest that the disease may have been transmitted through the Force itself. It was noticed by Cilghal that all those who were affected with the disease had been stationed on Shelter in the Maw during the Yuuzhan Vong War.

After being isolated inside a ysalamir-induced force bubble, Seff Hellin showed signs of recovery. Meanwhile, Yaqeel Saav'etu and Bazel Warv also contracted the disease, though Warv was able to recognize Organa Solo as a non-imposter for a brief time. Luke Skywalker and his son Ben discovered while on Sinkhole Station in the Maw that Jedi Knight Qwallo Mode had also been inflicted with the illness, though he seemed to possess a cure. It was during their time on the space station that Ben developed the theory that a powerful being named Abeloth who resided in the Maw was causing the illness.

Those infected

 * Qwallo Mode
 * Seff Hellin
 * Valin Horn
 * Jysella Horn
 * Natua Wan
 * Yaqeel Saav'etu
 * Bazel Warv

Appearances

 * Millennium Falcon
 * Outcast
 * Omen
 * Abyss
 * Backlash

Notes and references
Psicosis de la Fuerza