the pixies
Reading The Worm Ouroboros as ever -- there's a bit where Lord Juss is explaining to... Mivarsh Faz... what happened with his brother and the journey to rescue him and how what they must do came to him in a dream:
"And They that dwell in secret sent me word in a dream, bidding me, if I would have tidings of my dear brother, inquire in Koshtra Belorn." Which is where they are heading.
Anyway, and so I'm like huh. Maybe the pixies could do that stuff. Send people prophetic dreams lol. I had it that they can put curses on people (or places?) too. I don't see why not both.
So I'm like maybe Yarrow literally had like a vision that he should go visit Yew? I figured it all came up when Jesper came into his life and he basically realised the value of having relationships in his life lol and starts missing his mum. But would be kinda interesting if it came to him in a dream. Not mutually exclusive I guess...