Magus.

Lapham's on Yeats' linguistic alchemy ...

Magic imbrued Yeats’ thinking so profoundly that it’s nearly impossible to disentangle the strands without rending the garment. Kathleen Raine, a poet deeply influenced by Yeats, offered a useful formula: “For Yeats magic was not so much a kind of poetry as poetry a kind of magic, and the object of both alike was evocation of energies and knowledge from beyond normal consciousness.” The salient word there is “evocation,” casting the poet as a magus conjuring verbal spirits, not from his imagination but from a higher, or a deeper, place.