Prior to [[Patch 2.1]], opening a Nephalem Rift required 5 rift keys, and all players in a game could enter the same Rift once it was open. (This created the [[Rift it Forward]] phenomena.) In Patch 2.1 the Rift Key system changed to 1 Rift Key for each player who wished to enter the rift. The same applies to [[Greater Rifts]], which require 1 [[GRK]] of the correct level for character who wishes to enter.