megamultiverse idea. I wanted to incorporate the road to Emmaus because this story is resonant and evocative. It has been suggested that the Hindu gods can be seen as the man on the road to Emmaus and one of those gods said that the gods are his million faces. See here.
Similarly, St Paul saw an altar to an Unknown God. Of course, Paul drew monotheist conclusions but, in terms of mythological writing and imaginative fiction, we can envisage an anonymous deity or divine Phantom Stranger flitting between pantheons. Norse mythology names Ullr but recounts no stories about him although he appears briefly in Poul Anderson's War Of The Gods. Thus, Ullr might join our list of mysterious characters who move between universes doing important undercover work?