Chapter 17 Moonlight Mountains“Penn, what is it, and why can’t we use magic?” I asked. Penn, still smiling, “It’s Withurobismuthite. We Tinkers call it Withuro. It’s a mineral with special properties.” Penn was making plans. He removed a sack from one of his pouches. “Aurora, you, Lacey and Clerebald fill this sack with as much as you can find. Willow, move ahead and find a sharp turn in this tunnel.” “Aurora, what is this stuff?” I asked again. “The mineral is combustible. But that’s not its only feature. The mineral also absorbs magic energy.” “Absorbs it?” I asked. “If you cast spells around it, the magic will often fail. If a spell doesn’t fail, you can get unexpected results.” Aurora was chipping away at the walls, “I believe that is what Master Penn is counting on.”

