Unable to find his master, by 9 BBY Rayvis and his group of Bedlam Raiders entrenched their presence in the caverns to continue searching for clues. The Raiders stationed some of their reprogrammed Separatist battle droids in the caverns. They also built a small depot in the caves, co-opting Republic facilities for their own uses, storing droid parts, weaponry, and other supplies.
The caverns were dangerous for Koboh prospectors who dared explore the maze-like tunnels. The endemic bulbous fungi, which developed mouths, tongues, and touch sensation, would explode with extremely strong acid which could rapidly melt metal. These fungi gave off an acidic odor as well. In addition to the flora, the presence of Bedlam Raiders created significant risk. At some point before 9 BBY, a rancor took up residence in the caverns. Some speculated that the Bedlam Raiders lured it there, but regardless, the Raiders provided the rancor with a steady supply of humanoid victims to devour.
Other installations in the Phon'Qi caverns included a network of turbolifts and a lattice-like series of rafters and buildings connecting their various dig sites.