Descent into Undermountain
The Melairkyn are an ancient dwarven clan of artisans, explorers and traders. When King Melair I discovered deposits of mithral in the rock beneath Mount Waterdeep in -1288 DR, the area was rapidly expanded into Melairbode, or what is now the Undermountain. Their home was under increasing threat from the drow over the course of the centuries, until a huge attack in 34 DR which killed King Melair IV who was their ruler at the time, and forced them deeper into the mountain. They were driven out of the Undermountain in 211 DR.