Wizard at Large by Terry Brooks

derivatory.”
    “Which means what?”
    “Which means that the Darkling draws its strength from the holder of the bottle. Its magic is fed by the strength of character of the one who calls upon it—not by what is good and kind in that character, but by what is bad and hurtful. Anger, selfishness, greed, envy, other emotions that you can name as well as I, destructive emotions that lurk within all of us to some degree—the Darkling draws the power for its magic from these.”
    “It feeds on human failing,”Willow observed softly. “I have heard of such creatures, long ago banished from the mists.”
    “Well, that is not yet the worst of it,”Questor went on wearily. His mouth had twisted into a scowl that threatened to pull his nose down into his beard. “I mentioned before that the bottle seemed somehow familiar to me. It is—or was, a very long time ago. It has been more than twenty years since I last saw it. It was only just this evening that I was able to remember where.”He cleared his throat nervously. “I last saw it in the hands of my half-brother. The bottle belonged to him.”
    “Oh, oh,”Ben groaned.
    “But how did it get here?” Willow asked.
    The wizard sighed his deepest sigh yet. ‘To explain that, I have to go back in time.”
    “Not too far back, I hope?” Ben pleaded.
    “High Lord, I will go no further back than is necessary for the purpose of completing my explanation.”Questor was slightly indignant. “You must appreciate the fact that the amount of time either of us might believe necessary is somewhat subjective when one…”
    “Just do it, Questor—please!” Ben urged helplessly.
    Questor hesitated, shrugged, nodded, then rocked back once more. He was seated on a bench that offered no back support at all and appeared at every rock to be in danger of going over altogether. He tugged up his legs beneath his robe as a child would, drawing them close to his chest, and his owlish face assumed a faraway look. His brows knitted, and his lips tightened. He appeared to Ben to be a man who had eaten something disagreeable.
    Finally, he was ready. “You will remember that my half-brother was Court Wizard to the old King,”he began. They all nodded, the kobolds included. “I was without position at the Court, but I would visit from time to time anyway. The old King often gave me small tasks that took me to other parts of the kingdom—tasks that were of no particular interest to my half-brother. My half-brother had been named tutor to the old King's young son shortly after the boy's eighth year, and the whole of my half-brother's time thereafter was occupied with teaching that boy. Unfortunately, he was teaching the boy all the wrong things. He saw that the old King was weakening, aging more quickly, sick from ailments which could not be cured. He knew that the boy would be King after his father was gone, and he wanted control of the boy. Michel was his name. Michel Ard Rhi.”
    He cocked his head. “Michel had never demonstrated much character, even before he began spending all his study time with Meeks. But after my half-brother got his hands on him, he became a thoroughly despicable lad in no time at all. He was cruel and mean-spirited. He took greatdelight in tormenting everyone and everything. He was obsessed with the magic Meeks employed and he begged after it as would a hungry man for food. Meeks used the magic to win the boy over and then finally to subvert him altogether.”
    “Delightful,”Ben observed. “So what has this got to do with the bottle, Questor?”
    “Weil.”Questor had assumed his best professorial look. “One of the toys that Meeks gave to Michel to use was the bottle. Michel was allowed to summon the Darkling and order him about. The demon was extremely dangerous, you understand, but not if one appreciated his uses. My half-brother understood enough to keep the creature under control, and Michel's play presented no real threat to him. Michel used the