Sadrach's Splinter was a thin mesa in the Underchasm. It was connected to the Underchasm's east wall by a series of earthmotes and suspension bridges. A dark castle sat on top of the mote. Prior to the Spellplague the castle was the home of the human wizard Sadrach. However, the Spellplague drastically altered Sadrach's form so that he became part of the stone of the castle although we was able to create a body for himself out of the castle's walls. He lived on the mote with his pet monsters and slaves.