Diablo 4 Season 9: The Truths That Lie Within - Full Quest Guide
Uncovering the Mysteries of Diablo 4 Items the Horadric Strongrooms
In Diablo 4 Season 9, players will eventually come across a recurring quest called "The Truths That Lie Within." This mission becomes available immediately after completing "The Embers Yet Smolder" and marks your official introduction to one of the season's central mechanics: Horadric Strongrooms inside Nightmare Dungeons.
Whether you're grinding out reputation or just trying to progress the seasonal storyline, this guide will walk you through everything you need to know to complete The Truths That Lie Within efficiently-and maybe even unlock additional rewards along the way.
Quest Trigger: When Does It Start?
The quest "The Truths That Lie Within" will appear in your journal after finishing "The Embers Yet Smolder", which introduces the seasonal themes and Horadric mechanics. You don't need to be max level, but it's wise to have some combat-ready skills and defensive cooldowns active, especially for Nightmare content.
Quest Objectives
Enter a Nightmare Dungeon
Gain 150 Horadric Knowledge
(This comes from completing Horadric Strongrooms or slaying enemies inside the Nightmare Dungeon)
Preparation Tips
Before you step into your first Strongroom-equipped dungeon:
Open your Inventory > Horadric Spells Tab
Equip whatever Horadric Spells you've unlocked. These spells synergize with your class and offer substantial advantages.
Examples include:
Celestial Surge - Lightning-based AoE buffs
Thunderous Particle - AoE crowd control/damage spells
Use the Nightmare Sigil provided by the quest
This guaranteed Nightmare Dungeon has a Horadric Strongroom inside, so you don't need to find one on buy Diablo 4 gold your own.