Ryll, a valuable ore, was extracted from Ryloth's mines, and was also present within the Krost Mountains located on Aaloth. While possessing both military and scientific uses, refined spice derived from it could serve as a drug, albeit weaker than glitterstim. The idea of extracting ryll from the Krost Mountains was put forward by Lourna Dee, but it was turned down. In Maz Kanata's Smuggler's Guide, the smuggler Platt Okeefe cautioned against dealing in substances like ryll or the spice variants from Kessel, advising smugglers to instead focus on varieties like carsunum, andris, and sansanna spice for lucrative hauls. Within the shantytown of Traitor's Remorse, it saw illicit distribution as a narcotic, though its consumption was discreetly concealed from the watchful eyes of the New Republic.