Shadowkeep was the site of Shadowthrone's throne within the warren of Shadow. It appeared to be "an enormous lump of black glass, fractured with curving planes, rippled in places, with some corners glistening white as if crushed." Parts of the structure seemed to be made of mottled, dull, and weathered obsidian while others seemed partially translucent and glowing from within. The structure contained no doors, windows, or gates, but was entered seemingly by passing directly through the stone. The keep's image was carved onto the altars of the temples of Shadow.