“Ah. Then you mean that certain sounds, certain vibrations in the air, somehow tap into this energy? Sounds that might be produced at random by any creature or thing?”

“Yes, Master.”

“Does not that seem absurd?”

Confused, Eragon said, “It doesn’t matter if it seems absurd, Master; it just is. Should I think it absurd that the moon wanes and waxes, or that the seasons turn, or that birds fly south in the winter?”

“Of course not. But how could mere sound do so much? Can particular patterns of pitch and volume really trigger reactions that allow us to manipulate energy?”

“But they do.”

“Sound has no control over magic. Saying a word or phrase in this language is not what’s important, it’sthinking them in this language.” With a flick of his wrist, a golden flame appeared over Oromis’s palm, then disappeared. “However, unless the need is dire, we still utter our spells out loud to prevent stray thoughts from disrupting them, which is a danger to even the most experienced magic user.”

The implications staggered Eragon. He thought back to when he almost drowned under the waterfall of the lake Kóstha-mérna and how he had been unable to access magic because of the water surrounding him.If I had known this then, I could have saved myself, he thought. “Master,” he said, “if sound does not affect magic, why, then, do thoughts?”

Now Oromis smiled. “Why indeed? I must point out that we ourselves are not the source of magic. Magic can exist on its own, independent of any spell, such as the werelights in the bogs by Aroughs, the dream well in Mani’s Caves in the Beor Mountains, and the floating crystal on Eoam. Wild magic such as this is treacherous, unpredictable, and often stronger than any we can cast.

“Eons ago, all magic was thus. To use it required nothing but the ability to sense magic with your mind—which every magician must possess—and the desire and strength to use it. Without the structure of the ancient language, magicians could not govern their talent and, as a result, loosed many evils upon the land, killing thousands. Over time they discovered that stating their intentions in their language helped them to order their thoughts and avoid costly errors. But it was no foolproof method. Eventually, an accident occurred so horrific that it almost destroyed every living being in the world. We know of the event from fragments of manuscripts that survived the era, but who or what cast the fatal spell is hidden from us. The manuscripts say that, afterward, a race called the Grey Folk—not elves, for we were young then—gathered their resources and wrought an enchantment, perhaps the greatest that was or ever shall be. Together the Grey Folk changed the nature of magic itself. They made it so that their language, the ancient language, could control what a spell does . . . could actually limit the magic so that if you saidburn that door and by chance looked at me and thought of me, the magic would still burn the door, not me. And they gave the ancient language its two unique traits, the ability to prevent those who speak it from lying and the ability to describe the true nature of things. How they did this remains a mystery.

“The manuscripts differ on what happened to the Grey Folk when they completed their work, but it seems that the enchantment drained them of their power and left them but a shadow of themselves. They faded away, choosing to live in their cities until the stones crumbled to dust or to take mates among the younger races and so pass into darkness.”

“Then,” said Eragon, “it is still possible to use magic without the ancient language?”

“How do you think Saphira breathes fire? And, by your own account, she used no word when she turned Brom’s tomb to diamond nor when she blessed the child in Farthen Dûr. Dragons’ minds are different from ours; they need no protection from magic. They cannot use it consciously, aside from their fire, but when the gift touches them, their strength is unparalleled. . . . You look troubled, Eragon. Why?”

Eragon stared down at his hands. “What does this mean for me, Master?”

“It means that you will continue to study the ancient language, for you can accomplish much with it that would be too complex or too dangerous otherwise. It means that if you are captured and gagged, you can still call upon magic to free yourself, as Vanir did. It means that if you are captured and drugged and cannot recall the ancient language, yes, even then, you may cast a spell, though only in the gravest circumstances. And it means that if you would cast a spell for that which has no name in the ancient language, you can.” He paused. “But beware the temptation to use these powers. Even the wisest among us hesitate to trifle with them for fear of death or worse.”

The next morning, and every morning thereafter so long as he stayed in Ellesméra, Eragon dueled with Vanir, but he never lost his temper again, no matter what the elf did or said.

Nor did Eragon feel like devoting energy to their rivalry. His back pained him more and more frequently, driving him to the limits of his endurance. The debilitating attacks sensitized him; actions that previously had caused him no trouble could now leave him writhing on the ground. Even the Rimgar began to trigger the seizures as he advanced to more strenuous poses. It was not uncommon for him to suffer three or four such episodes in one day.

Eragon’s face grew haggard. He walked with a shuffle, his movements slow and careful as he tried to preserve his strength. It became hard for him to think clearly or to pay attention to Oromis’s lessons, and gaps began to appear in his memory that he could not account for. In his spare time, he took up Orik’s puzzle ring again, preferring to concentrate upon the baffling interlocked rings rather than his condition. When she was with him, Saphira insisted that he ride upon her back and did everything that she could to make him comfortable and to save him effort.