This brings back memories of the 1980s. The Church Universal and Triumphant had posters plastered all over college campuses about their retreats. As I recall, according to the posters at said retreats one could "quaff potions created by Merlin" - yes, THAT Merlin from Arthurian legend.

The posters also, incongruously, had this androgynous-looking image prominently displayed:

https://store.summitlighthouse.org/images/thumbs/0000144_pos...

I thought up until very recently that this was supposed to be an image of Elizabeth Clare Prophet (whose name I thought also was surely made-up), and always wondered why this woman had a mustache :)