In the mirror universe, Izar was a planet of the Breen Confederacy in the Boötes constellation. Until the late 23rd century, the world belonged to the Terran Empire. During the Khitomer Conference in 2293, Terran Emperor Spock told Senator Pardek that the Tholian Assembly planned for the Breen to seize all Terran territory from Izar to Vega. (ST - Mirror Universe novel: The Sorrows of Empire)