Ogre Battle: The March of the Black Queen

From the introduction:

The stone is cool beneath your feet. A wind smelling of ash and copper barrels past you, staining the white robe now covering your body. On all sides you are surrounded by a rocky plain, flat, barren, exposed. The sky above is black as night with storm clouds that rumble and crash with barely contained energy. In the distance, you hear another kind of rumble. Thousands of feet, marching in your directions. From the East and West, they come.