The Voynich Manuscript is one of my favorite unsolved mysteries of the literary world: a manuscript no one can date in a language no one can decipher about no one knows what. It's a bunch of flowers and women showering. I think it's the equivalent of someone a thousand years from now digging up a D&D Monster Manual: "What does it mean?"
If you want to check out the manuscript yourself, head to Yale's online library and type in "Voynich." It's the first result.
My dad asked my why my character was purple and glowy the other day, so ... Is there any lore-icle reason for Shadowform for priests? Other than looking cool?
All priests use aspects of the Forgotten Shadow, sort of the other side of the Light, in practice, but shadow priests are way into it. Priests who are completely at one with the Shadow can (some say) ascend to god-like status, achieving ultimate power and immortality. Shadowform is essentially your character's getting as close to ascension as he can. Commenter "Furry" puts it well: "It's a physical show of how your soul is going to a darker place."