“A long time ago, the fairies sent the white unicorns into Landover on a journey to certain of the mortal worlds. We know that much from the histories. The unicorns were the most recognizable magic the fairies possessed, and they sent them to those worlds where belief in the magic was in danger of failing altogether. After all, there has to be some belief in the magic — however small — for any world to survive.
“But the unicorns disappeared. They disappeared because the wizards of Landover waylaid and imprisoned them. They wanted the unicorns’ magic for their own use. Remember, Questor, when you told me that the wizards were once a powerful guild that hired out — back before the King sent the Paladin to dispose of them? Well, I’m betting a major part of that magic came from the imprisoned unicorns — magic that the wizards siphoned off. I don’t know what magic they possessed to trap the unicorns in the first place — a deception of some sort, I’d guess. That seems to be their favorite trick. At any rate, they caught them up, changed them into drawings, and trapped them in those books.”
“But not whole,” Willow said.
“No, not whole,” Ben agreed. “This is where it gets interesting. The wizards separated the body from the spirit of each unicorn in making the transformation. They imprisoned the body in one book and the spirit in the other! That weakened the unicorns and made them easier to hold. The body without the spirit is never as strong. The wizards’ magic was potent enough to imprison each separately; the trick was to prevent them from joining again.”
“Which was the danger Meeks faced when the black unicorn escaped,” Willow added.
“Right. Because the black unicorn was the collective spirit of the imprisoned white unicorns!” Ben furrowed his brow. “You see, so long as the wizards could maintain the strength of the magic that bound the books, the unicorns could not break free and the wizards could drain the unicorns’ magic as well and put it to their own use. Even after Landover’s King sent the Paladin to crush the wizards’ guild years ago, the books survived. They were probably kept hidden for a time. Even later, the wizards still remaining, those now in service to the King, were careful not to let anyone know the real source of their power. And the books were passed down from wizard to wizard until at last they came to Meeks.”
He touched his index finger to his lips. “But — in the meantime — there was a problem with the unicorns. Every so often, they escaped. Something would happen, the wizards would relax their vigilance, and the unicorns would break free. It didn’t happen often, of course, because the wizards kept close watch over the books. But now and again, it did. Each time, it was the spirit part of the imprisoned unicorns that managed to escape — the magic of the spirit always being stronger than that of the body. The spirit would burn its way free of the pages of the book of magic that bound it and escape. But it lacked a true physical presence. It was only a shadow formed of need and will, a silhouette given momentary substance and life — and not much more.” He glanced quickly at Willow for confirmation, and she nodded. “And because it was black in color, being only a shadow, it was generally assumed to be something evil rather than something good. After all, whoever heard of a black unicorn? The wizards, I am certain, spread the story that the black unicorn was an aberration — a dangerous thing, perhaps even a demon. They probably set a few examples to reinforce the belief. That kept everyone away from it while the wizards worked at getting it back again.”
“The bridle of spun gold was used for that purpose,” Willow interjected, picking up the story. “The wizards employed their magic to create the bridle after the first escape. The bridle was a magic that could draw and hold the black unicorn, giving the wizards time to imprison it anew. It was always caught quickly; it was never free for long. It was sent back again into the books of magic, the burned pages were restored, and all was as it had been. The wizards took no chances. The books were their greatest magic, and they could not risk damage to or loss of them.”