The Cimliss were a species obsessed with business, similar to humans, Usurians and Okk. Legion had encountered them before, (PROSE: Lucifer Rising)
The Seventh Doctor once had Cimliss money while in a bar with Benny on Barrabas Gamma, but it jumped out of his hand and crawled into the shadows. It was still reproducing change in dark corners for weeks. (PROSE: All-Consuming Fire)