The performance piece Fairy Goblet of Eden Hall appeared in the Annemann's Jinx in 1941, it describes a ritual where each 'guest'' is invited to step forward to experience and share a vision of a past memory revealed to them by Titania's Fairy Goblet in a 'weird and uncanny manner''. Hunting Mammoths in the Rain was published in 2007 and demonstrates how an unearthly symbol discovered on an ancient rock can lead to a primal and olfactory experience for an audience. Both pieces represent key experiments in underground experiential performance magic. In such pieces the magician (or, more accurately, the mystery entertainer) acts as a facilitator guiding the guests/audience through a form of ostensive magical behaviour. This paper will e...