Tralb was a poison that was said to be extractable from either of two sources: snakes found in the Holy Desert of Raraku in Seven Cities; or from certain mushrooms. The name came from the Seven Cities (Bisbrha and Debrahl) language. It was used by Iskaral Pust, High Priest (or 'Magus') of High House Shadow, to make tralb tea - which he drank and found "warming", but it was not specified how common (or how wise) a practice this was in general.