Diablo 4: How to Diablo 4 Items Get and Use Nightmare Sigils in Season 9

Nightmare Sigils have become a central part of Diablo 4's endgame progression, and in Season 9 - Sins of the Horadrim - they're more essential than ever. Not only do they unlock powerful Nightmare Dungeons that drop Paragon Glyphs, XP, and endgame loot, but they're also required for key Seasonal Quests such as The Truth That Lies Within, which tasks players with entering Horadric Strongrooms inside Nightmare Dungeons.

If you're unsure how to get more Nightmare Sigils or how to use them, this guide breaks it all down.

What Are Nightmare Sigils?

Nightmare Sigils are special Diablo 4 Items that unlock Nightmare Dungeons - high-difficulty versions of regular dungeons with affixes that modify gameplay. These dungeons:

Drop Paragon Glyphs for your Paragon Board.
Reward large amounts of XP, Gold, and gear.
It is the only place to find Horadric Strongrooms in Season 9.

Each Sigil has:

A Tier Level (determines difficulty and rewards).
A Dungeon Name (location it applies to).
Positive and Negative Affixes (new in Season 9).

How to Get Nightmare Sigils in Diablo 4

You can get Nightmare Sigils through several methods, including:

1. Crafting at the Occultist

Requirements:

60 Sigil Dust
4000 gold

How to Craft:

Visit any Occultist in major towns.
Go to the second tab ("Craft Sigil").
Select a Random Tier Sigil to create.

You can also salvage extra Nightmare Sigils at the Occultist for Sigil Dust, helping you create new ones more efficiently.

2. Seasonal Caches & Quest Rewards

Completing quests like The Embers Yet Smolder and The Truth That Lies Within will often reward you with Nightmare Sigils.
Completing Seasonal Journey Chapters and Diablo 4 materials for sale Strongholds can also reward caches that sometimes include Sigils.