"Changelings call it "Gravesand". Derived from the pulverized bones of fallen Gumm-Gumms, gravesand aids us changelings in shedding our human form and embracing our more trollish nature..." Strickler is a little off in his calculations and the gravesand draws out an unexpected response from Jim. Hopefully he can figure out what is wrong and how to fix it before it is too late.