There are many dreamstones out there but none of the little Glamour batteries can compare with the Dreamstone of Madoc. Its origin is unknown but it was first discovered in an Appalachian ridge top by fae colonists in the 12th Century. It appeared as a fist-sized moonstone, although given its nature it may have changed its appearance after eight centuries. The Glamour it focuses may "leak," causing the one closest to it to have vivid dreams they always remember on waking. Its greatest ability, though, is the power to shape dreamstuff. A skilled Dreamcrafter can create chimerical creatures of immense power, fold the Dreaming in on itself to create pocket realms, or build a trod or gateway where there was none before. The untested rumor is that it could even find and open the way to Arcadia.
It was used to open a trod between Europe and the Americas, causing a war between the Nunnehi and the Welsh fae but the stone disappeared shortly after the trod was formed, to the dismay of the sidhe it was stolen from. No one knows, to this day, what became of it except the one who stole it: Elgin the Boggan.