Madame Zara (PROSE: Snakedance) was a fortune teller on Manussa, although she bragged to a possessed Tegan Jovanka that she just told peopel whatever popped into your head.
The Mara in Tegan showed the skull of a snake inside her crystal ball before it exploded, making her scream in fear. The Mara-Tegan told Nyssa about seeing "right down her throat" and laughed. (TV: Snakedance)