In the mirror universe, the OS Osskol was a starship of the Cardassian Union, in service to the Obsidian Order in the 24th century. (MU novel: Rise Like Lions)


In January 2379, the Osskol confirmed readings taken by the Signals Intelligence Unit of Rhenara V on 23 Hamarak 4891. The Osskol was asked by Obsidian Order Observation Station Kelgot, with permission granted by Gul Trokal, to verify SIU's data. OS Osskol confirmed that Rhenava V had been geosculpted from a Type 9 uninhabitable to a Type 5 habitable planet. (MU novel: Rise Like Lions)