Greater Rift 70+

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 4 days. 

Requirements:
Account sharing
Reaper of the Souls

Rewards:
3 Legendary Gems (Rank 45+)
Greater Rift 70 Capability
Kanai's Cube
Paragon Experience (Paragon 500)
Gems, Crafting Materials