Zereel is the Tolnedran court wizard, described as "one of the best" and the late Ran Borune XXIII considered his opinion the best authority on mythology. He is described as a lean, bushy-browed man in a red mantle covered with mystic symbols.
"You see," the Emperor said to Aunt Pol. "You don't exist. I have it on the very best authority. Zereel's a wizard himself, you know."
"One of the very best," he assured her. "Of course most of his tricks are just sleight of hand, since sorcery's only a sham, but he amuses me and he takes himself very seriously. You may proceed, Zereel, but try not to raise an awful stink, as you usually do."
"That won't be necessary, your Highness," Zereel said flatly. "If they were wizards of any kind, I'd have recognized them immediately. We have special ways of communicating, you know."
Aunt Pol looked at the wizard with one eyebrow slightly raised. "I think that you should look a bit closer, Zereel," she suggested. "Sometimes we miss things." She made an almost imperceptible gesture, and Garion seemed to hear a faint rush of sound.
The wizard stared, his eyes fixed on open air directly in front of him. His eyes began to bulge, and his face turned deathly pale. As if his legs had been cut from under him, he fell onto his face. "Forgive me, Lady Polgara," he croaked, groveling. -- The Queen of Sorcery