Unique monsters - rift guardians

Below list of every known unique monsters in game (712). Click on name to read details or on image to see gallery.
Rift guardians are bosses appearing at the end of Nephalen Rifts or Greater Rifts when the progress bar is full. In order to challenge the player they give a variety of melee and ranged attacks, some of them can also teleport. After killing the guard, we get the opportunity to improve the legendary gems.