Shrine of the Eclipse is an area inside Sunwell Plateau. M'uru/Entropius is found here. The shrine is a large circular and overly dark room that is layered in 3 circles in the center, the outer rim, the middle ring and the core where M'uru is stationary and where Entropius spawns.
The interior of the shrine.
Adorning the walls and arches of the shrine are translucent curtains, through which players are able to get a very good view of the Sunwell below.