Stormchaser:
        "'What it takes hundreds of years for the Twilight Woods to do naturally, we can do with a single crushing blow. But that blow can only, must only, fall at the very moment of...'
        'Twilight!' gasped Twig." page 285-6 paragraphs 8,1, 2
                  After killing Screed, during the professor's last moments, Twig discovers the secret to making phraxdust. But how can they spread word if they are stuck in the mire? Twig realizes he is in a wrecked sky ship, the Windcutter, and if he and the Stone Pilot, the only crew member left can fix it...