Are you playing on the American realm?

Greater Rift 60+

Greater Rifts have randomly generated tilesets, layouts, and monsters. Greater Rifts are all about killing speed and tactics, without item drops or gold to distract players.
Leveling itself takes 2 days. 

Account sharing
Reaper of the Souls

3 Legendary Gems (Rank 35+)
Greater Rift 60 Capability
Kanai's Cube
Paragon Experience (Paragon 400+)