Season 15 Guide
DIABLO IV / SEASON 15 / WAKING NIGHTMARES

Waking Nightmares: the Three Types and Where You Swap Splinters

Waking Nightmares are not one place but three differently sized encounters, and only the largest lets you swap your Splinter of Evil. This patch 3.2.1 guide covers the distinctions Blizzard states explicitly and how you reach each one. Specific entrances and reward amounts are not published, so they are not listed here.

Verified patch: 3.2.1Verified: 2026-09-23Three typesFixed difficulty
QUICK ANSWER

There are three. The largest is a multi-level Capstone-type dungeon with a fixed difficulty, available as a pinnacle Capstone at Torment 10 and above. The second is a standard-length dungeon with fixed locations, like any normal dungeon. The third and smallest appears suddenly in the open world as a single room. To change which Splinter of Evil you carry, go to the largest type.

TYPES

The Three Types

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01

Largest: multi-level Capstone-type dungeon

A multi-level dungeon recreating historic showdowns with the Prime Evils. You first meet these in the Seasonal Questline, then replay them for rewards on Torment levels. Like all Capstones, the difficulty level is fixed.

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Middle: standard-length dungeon

Appears as a standard-length dungeon recreating familiar moments from Diablo's past, such as the Den of Evil from Diablo II. These have fixed locations across the world, just like normal dungeons.

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Smallest: a single room in the open world

Appears suddenly in the open world. It is a one-room encounter with a past boss such as the giant spider Queen Araneae, or waves of memorable monsters such as dagger-wielding Flayers.

CAPSTONE

What Only the Largest One Does

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It is where you swap Splinters of Evil

You can only bear one Splinter of Evil at a time, but you can change it. To pick a different Prime Evil's reputation track and rewards, you acquire another Splinter from the largest Waking Nightmares. The mid-size and one-room versions do not offer this.

Fixed difficulty, not adjustable

Like all Capstones, the difficulty level is fixed. You cannot lower it to push through when your gear is not ready.

A pinnacle version opens at Torment 10+

At Torment 10 and above these become available as pinnacle Capstones. Blizzard describes them as carrying greater risk for bigger loot. The specific rewards are not published.

ACCESS

How to Reach Each One

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Largest: you pass through it in the Seasonal Questline

No searching required. Progressing the Seasonal Questline produces the first encounter, and replays open up afterwards.

Middle: look for fixed map locations

These behave like normal dungeons, so once you find one the location does not move. Enter from the dungeon markers on the map.

Smallest: encounter it while out in the world

This type appears suddenly, so it is not something you travel to. Treat it as something you enter when you come across it while farming. Blizzard has not published how often they spawn.

PENDING

What This Page Does Not Cover Yet

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Blizzard describes the three types but not the entrances, spawn rates or reward amounts. Rather than guessing, the items below are held back until they can be confirmed in game.

  • The specific entrances. Blizzard states only that the locations are fixed, without naming regions or coordinates.
  • How often the open-world version spawns, and under what conditions.
  • Reward amounts per Torment level and how the three types compare. Farming priority cannot be decided without this.
  • The full list of bosses in the largest version and how to handle each.
CAUTION

Common Mistakes

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  • Trying to swap Splinters at the one-room or mid-size version. Only the largest one offers that.
  • Trying to lower the difficulty to clear the largest version. It is a Capstone, so the difficulty is fixed.
  • Going looking for the open-world version. It appears suddenly, so travelling to a spot does not help.
  • Treating Waking Nightmares and Soul Splinters as the same subject. The former is an activity; the latter are gems you slot into jewelry.
PATCH 3.2.1

Confirmed in Patch 3.2.1

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  • Waking Nightmares are provided as three types of encounters.
  • The largest are multi-level Capstone-type dungeons with a fixed difficulty level.
  • At Torment 10 and above they are available as pinnacle Capstones.
  • The second type is a standard-length dungeon with fixed locations.
  • The third type is a one-room encounter appearing suddenly in the open world.
  • Swapping your Splinter of Evil happens at the largest Waking Nightmares.
NEXT

Related Guides

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Season 15 Overview

How to start the season, the questline, and what to do first.

How to Choose and Switch Splinters of Evil

Activity mapping for Terror, Destruction and Hatred, and the switching rules.

All Eight Soul Splinters and How Fusion Works

The jewelry gems, a separate system from Waking Nightmares.

Difficulty and Torment

How Torment levels work and what it takes to reach Torment 10.

SOURCES

Official Sources

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Blizzard: Season of Hell's Legacy Overview and 3.2.1 Patch Notes2026-09-23Blizzard: Season of Hell's Legacy Overview2026-09-23