The Katai were a Klingon group similar to the Dahar Masters. This secret group were "fire bringers" or teacher-builders. These great warriors were the two thousand or so survivors of the Hur'q invasion that pledged their lives to the continuation of Klingon culure. In 2375, they supported Martok on Boreth against Morjod. All thirteen fought alongside Martok and his allies. When Martok selected a new High Council of the Klingon Empire, many of the positions were filled by the Katai survivors. Urthog was a Katai. (DS9 novel: The Left Hand of Destiny)