This forbidding keep fashioned from black basalt stands atop the cliffs near the mouth of the White River. The keep has only a single entrance (a doorway at ground level) and no windows or battlements.   Ironfang has long been reputed to be the home of a school or community of wizards of great and dark power. A petty king or minor baron sends a party of adventurers to Ironfang every decade or so, only to discover soon afterward the remains of the group stacked like cordwood in his bedroom. An army once sent out of Mulmaster only succeeded in stirring up the local gnoll population.   The keep seems impervious to all divinations and teleportation effects, even those cast inside its walls. It is unclear whether this effect resides in the area surrounding the keep or if it is due to some property of the keep’s walls.   No credible accounts of the keep’s interior exist, but accounts from occasional survivors of encounters with the keep’s wizards indicate that they seem most active at night, and their magic is exceedingly difficult to detect or dispel. Some speculate that the keep houses a school for Shadow Weave users, a cabal of shadow adepts, or both