He came back.
It wasn't completely unexpected, of course. Few can resist the lure of the Underside, once they've tasted its magic. Lear, Iliaster, all the others living half-lives, they could survive entirely in the Upworld, if they could just stay away, which of course they can't.
But he... he had a chance to return to his life, just as it was. Nobody has ever received that chance before, and nobody ever will again.
And he came back, down to the dark with us. I was waiting for him. He owes me a favour now... and I will enjoy collecting.