"This is not just another case," said Merlin. "By agreeing to undertake it, you have set in motion a thing that cannot be stopped, caused ripples in Space and Time, alerted all kinds of Powers who have waited long and long for this to happen. Old forces are awakening, in and outside the Nightside, to aid or stop you. More than you can imagine is at stake here. There was a time I would have killed you out of hand, to prevent this thing from happening. Good and bad will die, terrible forces will clash by night, and nothing will ever be the same again. But perhaps it is time for the truth to come out, at last. Perhaps it is time for a new thing to be born, out of the death of the old ..." He brooded silently for a moment. "I brought you here, John Taylor, to tell you what I know. To set you on your way. Perhaps because I do not know the origins of the Nightside, and it irks me that for all my strength and power there are still things I cannot See. I want to know."

"Do you think that knowing will release you from this bar?" I said slowly. "Free you to be fully dead and gone, at last?"

Merlin laughed, though there was precious little humour in the rough, raw sound. "No, boy. No-one holds me here but me. I wait for the return of my heart, and my full power, and then ... Then, there shall be a reckoning!"

(Short version. The witch Nimue stole his heart, then lost it. Everyone knew that much. And that a whole lot of Merlin's power departed with the heart. Absolutely no-one wanted to find the heart, or reunite it with its owner. No-one was that stupid. Merlin was dangerous enough as he was.)

"The true nature of the Nightside's birth is tied in with the identity of your lost mother," said Merlin, almost casually. "That's one of the few things that everyone agrees on. Though strangely no-one can identify a definite source for that knowledge. Don't ask me who your mother is, or might be. She is one of the very few beings I' ve never been able to See with my mind, sleeping or awake. There was a moment, some years before you were born, when the whole Nightside looked up, startled, as Something utterly unexpected flared brightly in everyone's consciousness. Something Old and terribly powerful had been reborn into the material world, and the balance of everything changed, forever. The moment passed almost immediately, the new arrival shielding itself from everyone's eyes. Which should, of course, have been impossible. Just the first of many worrying signs and portents ... Your mother was, and presumably still is, at the very least a Power and a Domination.

"My own best guess is that your mother is, or was briefly in the past, that most powerful witch Morgan La Fae. The only one powerful enough to oppose me during Arthur's reign. A strange creature; powerful, yes, and undeniably beautiful, but I cannot say I ever understood her mind. I always suspected she was much more than she ever admitted, to me or to Arthur. And I never did believe that sob story she spun for Arthur, about being his half-sister. She only said that to get close to him; he always had a weakness for those he considered family. That's what comes of being raised as an orphan. She used Arthur to produce a son, Mordred, then used that son to bring down Camelot. I have to wonder whether your mother might have produced you to bring down the Nightside. Oh yes; I know what you experienced in that Timeslip. The terrible future you saw. Everything destroyed and everyone dead, at your hands. Quite a few Powers have seen that future in visions, down the years."