The Rift Guardian in this rift is also a cow: The Lord of Bells. Each monster killed during this event will award all players in the game bonus gold and experience.

On the first floor there's a modified Jar of Souls event, where you have to kill as many cows as possible before the timer runs out. Each floor is a small Crypt of the Forsaken map, which is populated exclusively by Infernal Bovines. In terms of gameplay, the Developer Rift is nothing special but you are usually happy to see it because of how fast it can be cleared. Each of zombie and skeleton wandering the map has name of a member of Reaper of Souls dev team, with their role instead of creature type. The second floor of the rift is another Briarthorn Cemetery map, but this time it has no Elites at all.

The Rift Guardian is a Unique Punisher called Josh Mosqueira (the game director of Diablo III at the time of Reaper of Souls release). You can typically spawn the Rift Guardian after clearing about 70% of the first floor.

The first floor is medium-sized Briarthorn Cemetery map with its native mobset and insane Elite density. These rifts have fixed maps and unique Rift Guardians.

Each time you open a Nephalem Rift there's a small chance that you get one of the two special rifts.

Diablo 3 necromancer greater rift build