The Colour of Magic

again.
    “I’m not rescued, am I?” he said. “I’m captured, right?”
    “Of course.”
    “And you’re not letting me go?” It was a statement.
    Druellae shook her head. “ You hurt the Tree . But you are lucky. Your friend is going to meet Bel-Shamharoth. You will only die.”
    From behind two hands gripped his shoulders in much the same way that an old tree root coils relentlessly around a pebble.
    “With a certain amount of ceremony, of course,” the dryad went on. “After the Sender of Eight has finished with your friend.”
    All Rincewind could manage to say was, “You know, I never imagined there were he-dryads. Not even in an oak tree.”
    One of the giants grinned at him.
    Druellae snorted. “Stupid! Where do you think acorns come from?”
    There was a vast empty space like a hall, its roof lost in the golden haze. The endless stair ran right up through it.
    Several hundred dryads were clustered at the other end of the hall. They parted respectfully when Druellae approached, and stared through Rincewind as he was propelled firmly along behind.
    Most of them were females, although there were a few of the giant males among them. They stood like god-shaped statues among the small, intelligent females. Insects, thought Rincewind. The Tree is like a hive.
    But why were there dryads at all? As far as he could recall, the tree people had died out centuries before. They had been out-evolved by humans, like most of the other Twilight Peoples. Only elves and trolls had survived the coming of Man to the Discworld; the elves because they were altogether too clever by half, and the trollen folk because they were at least as good as humans at being nasty, spiteful and greedy. Dryads were supposed to have died out, along with gnomes and pixies.
    The background roar was louder here. Sometimes a pulsing golden glow would race up the translucent walls until it was lost in the haze overhead. Some power in the air made it vibrate.
    “O incompetent wizard,” said Druellae, “see some magic. Not your weasel-faced tame magic, but root-and-branch magic, the old magic. Wild magic. Watch.”
    Fifty or so of the females formed a tight cluster, joined hands and walked backward until they formed the circumference of a large circle. The rest of the dryads began a low chant. Then, at a nod from Druellae, the circle began to spin widdershins.
    As the pace began to quicken and the complicated threads of the chant began to rise Rincewind found himself watching, fascinated. He had heard about the Old Magic at University, although it was forbidden to wizards. He knew that when the circle was spinning fast enough against the standing magical field of the Discworld itself in its slow turning, the resulting astral friction would build up a vast potential difference which would earth itself by a vast discharge of the Elemental Magical Force.
    The circle was a blur now, and the walls of the Tree rang with the echoes of the chant—
    Rincewind felt the familiar sticky prickling in the scalp that indicated the build up of a heavy charge of raw enchantment in the vicinity, and so he was not utterly amazed when, a few seconds later, a shaft of vivid octarine light speared down from the invisible ceiling and focused, crackling, in the center of the circle.
    There it formed an image of a storm-swept, tree-girt hill with a temple on its crest. Its shape did unpleasant things to the eye. Rincewind knew that if it was a temple to Bel-Shamharoth it would have eight sides. (Eight was also the Number of Bel-Shamharoth, which was why a sensible wizard would never mention the number if he could avoid it. Or you’ll be eight alive, apprentices were jocularly warned. Bel-Shamharoth was especially attracted to dabblers in magic who, by being as it were beachcombers on the shores of the unnatural, were already half-enmeshed in his nets. Rincewind’s room number in his hall of residence had been 7a. He hadn’t been surprised.)

    Rain streamed off the black walls of the temple. The only sign of life was the horse tethered outside, and it wasn’t Twoflower’s horse. For one thing, it was too big. It was a white charger with hooves the size of meat dishes and leather harness aglitter with ostentatious gold ornamentation. It was currently enjoying a nosebag.
    There was something familiar about it. Rincewind tried to remember where he had seen it before.
    It looked as though it was capable of a fair turn of speed, anyway. A speed which, once it had