The Scimitar is a huge vessel built by the Reman rebels on a secret base. Apparently superior to any ship of either the Federation or the Romulans, the Scimitar is capable of firing while cloaked. It is also equipped with a talaron emitter, a weapon that destroys any organic tissue. The talaron emitter is activated by unfolding the wings of the vessel. There is at least one large shuttlebay with dozens of Scorpion-class fighters.
Source: Ex Astris Scientia - Romulan Ship Classes
Source: Ex Astris Scientia - Romulan Ship Classes