Because of the intense burden Phoenix-class captains must bear, the Tal Shiar has been known to use unorthodox 'conditioning' techniques in their training. Its potential effect is so devastating, it requires a special shipyard for its construction. The Phoenix was originally developed by the Star Empire as a last resort, should the Romulan Empire fall to invaders. In order for the Star Empire to rise from its own ashes, a Phoenix must first burn.