In the mirror universe, Rhaza was a Klingon member of the House of Guul. In 2288, he was one of three newest and youngest members of the High Council, along with his friends Korax and Berik. The three challenged Gorkon after he suggested sacrificing Klingon worlds to double the military budget, but the challenge was set aside by Regent Sturka. (TOS novel: The Sorrows of Empire)