Rewards only scale up to Wave 150, there is no additional reward for going higher.Unfortunately there are no leaderboards either so there is no real incentive to try reaching the highest wave.

The scaling is similar to Greater Rifts until Wave 100, then it goes up. Above that monsters instead get damage reduction scaling every wave like Monsters' HP and damage before Wave 150.

Monsters' HP and damage stop scaling after Wave 150.

However the monsters can still be slowed. This means pulling abilities are useless and it also heavily nerfs builds relying on Hard CC to deal damage (like Necromancers with Krysbin's Sentence). Fear and Charm do work even though they're not that useful.

Monsters cannot be affected by most Hard Crowd Controls (Stun, Freeze, Knockback, Blind).

Using them strategically for the latest waves is the key to victory! More on this in the Tips section below.

4 Pylons are spread within the area, one in each corner: Conduit Pylon, Power Pylon, Channeling Pylon and Speed Pylon.

+12 waves if you clear the area almost instantly after a spawn.

+8 waves if you kill all monsters quickly after a spawn.

+6 waves if you kill all monsters on the battlefield.

+3 waves if you kill most of the monsters.

+2 waves if you kill a lot of freshly spawned monsters.

Players can progress faster by defeating monsters quickly:

Every few seconds, a new wave of monsters spawns.

You are overwhelmed when there are about 10 waves of monsters out on the battlefield.

The difficulty scales similarly to Greater Rift Levels as players progress throughout the waves.

Monsters from the Echoing Nightmares do not drop gold, items or health globes.

Some monster types might favor the player more depending on their aggressiveness or how many ranged monsters they have.

Each Echoing Nightmare has a randomly chosen monster type.

Unlike Greater Rifts, you can swap your gear during Echoing Nightmare encounters.It is not possible to open an Echoing Nightmare in a game that is not level 70.If the bar is full, you are considered overwhelmed and the event stops. There is a progress bar on your UI that fills based on how many monsters there are in the area. An endless wave of monsters spawns once the Echoing Nightmare has started.You can get Petrified Scream s from Greater Rift Guardians.Here is a few key points about this game mode: Season 26 introduces the Echoing Nightmare, an optional and rewarding end-game challenge where players fight within the memories of Nephalem who fell in Greater Rifts.

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