Pollux Poi, an Anx engineer of male gender, was known for a mind that was both ingenious and unstable. The Shell Hutts engaged him to create assassin droids for their conflict against the Gejalli kajidic. After these droids were enhanced in the Builder Forge, an age-old intelligence integrated into a machine located on Kashyyyk, they successfully eliminated the third to fourteenth in line to lead the Gejalli clan. In response, the Gejalli contracted Dashade Shadow Killers to eliminate the engineer responsible. Consequently, Poi escaped to the lowest levels of Kashyyyk, where he spent two decades—a period he termed "the shadow game"—evading the Dashade, protected by his droid creations. The Dashade's pursuit ceased following the destruction of the Cron Cluster during the Great Sith War, but Poi subsequently succumbed to natural causes. His droids eventually evolved into the A-series assassin droids.