| Category | Resources |
| Type | psychic energy storage |
| Source | the Xorn of the Sands of Hell |
Double the psychic energy storage capacity of deep crystal, xorn cysts come from the xorn living in the Sands of Hell. Unable to fully adapt to the world around them, the xorn grow bulging cysts.
In the Creation War (1486 DE - 8777 DE), the Knudmid were tasked with harvesting these cysts growing on the bodies of the Xorn people. For most, it was very unpleasant, degrading work.
The chekryan (Sandstorm, pg. 142), giant psionic scorpions of the Sand of Hells, came about from giant scorpions eating early stage xorn cysts.