The Temple of Decay
The Temple of Decay is an area in Act 7. It consists of two levels and an arena. There is no waypoint for the temple itself but the entrance is directly near the waypoint of the Vaal City.
Monsters
Arakaali is the final boss of the area and killing it will give access to Act 8.
Blideblight is a unique monster that is located on the level 1 of the Temple.