URUK comes from the meeting in 2016 of two totally unclassifiable musicians: Thighpaulsandra and Massimo Pupillo. Thighpaulsandra has an impressive track record particularly playing on many Coil albums. Traces of this influence can be found in the keyboards used on Mysterium Coniunctionis. Massimo Pupillo is well known for having slammed a lot of ears as the bassist with the highly imposing Italian jazzcore trio Zu. Their second album, Mysterium Coniunctionis makes direct reference to the eponymous and testamentary work of the psychiatrist Carl Jung, subtitled An Inquiry into the Separation and Synthesis of Psychic Opposites in Alchemy. It clearly reflects the duo's intention to create particularly immersive and meaningful music from supposedly opposing materials - in this case the meeting of electronic and organic sounds.