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[[File:Realm-of-trials1.jpg|thumb|350px|Hardcore death in RoT is forever.]]The '''Realm of Trials''' (AKA Trials or RoT or Greater Rift Trial or Grift Trial) is a mini-game feature that players can use to earn higher level [[Greater Rift Keystones]], enabling them to start off in higher level [[Greater Rifts]]. Players can not leave the Wave of Trials arena it except by returning to town, rather than starting at which can only be done after a level 1 Grift and working their wave is failed. There is also no way up through completing multiple Grifts. The wave-clearing to [[respec]] skills or change around equipment while in a Realm of Trials was made faster late in teh Patch 2.1 PTR, due to player complaints that the trials were taking too longTrial.

The Realm of Trials area is a small, dark, shadowy, circular , arena-style map with a couple of health poolsaround the outside. Players can not leave it except by returning to town. While in the Realm Once there, players undergo a Trial as waves of monsters appear. Each wave spawns about 40 enemies with and starts a 20 second timer running; if . If players kill all the monsters in the wave before the timer expires , another wave spawns, with slightly harder (more hit points and higher damage) enemies. (Changes during the PTR caused waves to jump more than 1 rank if players cleared them very quickly.) This process continues until players are unable to finish a wave within the time limit, at which point the Trial is over and no more waves will spawn.

When the last monster is killed outside the time limit the Trial is over and no more waves will spawn. Players can then return to town and speak to [[Orek]], who will reward them with a Greater Rift Keystone that corresponds to the highest level wave they were able to complete in the Trial. The difficulty of the waves roughly corresponds to the difficulty level of the Greater Rift, but the GRK reward is scaled down in about a 3:2 ratio. E.g. a player who completed 30 waves would get receive around a level 20 GRK. This is so players don't enter a Greater Rift level that's too hard for them to complete right from the start.[http://diablo.incgamers.com/blog/comments/realm-trials-greater-rift-levels]

Realm of Trials were feature was added in [[Patch 2.1]], after extensive testing on the [[PTR]].