Located in the eastern part of Brood of Nozdormu and the bronze dragonflight. It is their sacred charge to guard the caverns against the intrusion of mortals, whose interference would assuredly disrupt the flow of time. Recently, a mysterious force called the Infinite Dragonflight has begun to meddle with time.

The Black Morass is one of the timeways accessible in the Caverns of Time. In this wing, a group of players must defend the last Guardian Medivh, in a swamp known as The Black Morass. The Guardian Medivh, possessed by Sargeras, attempts to open the Dark Portal to Draenor, while wave upon wave of dragonkin of the Infinite Dragonflight attempt to defeat Medivh in order to alter time and halt the invasion of Azeroth from Draenor.