A milky white concentrated venom obtained from the whitefiddle, a species of "lesser great" spider native to cool, temperate deciduous and mixed forests named for the distinctive white mark on its back. Nimnaur (S."white fire") slowly (over 1-10 minutes) liquified one organ per dose (usually the one closest to the entry point).
Note: The raw "whitefiddle venom" was a generic reduction poison.