To unlock the Ancient Tome known as the Necromancy of Thay in Baldur’s Gate 3, you’ll need to locate a rare item called the Dark Amethyst and follow a specific sequence of actions. Here's a clear, step-by-step guide:
✅ Step-by-Step Guide
1. Locate the Ancient Tome:
Head to the Blighted Village and enter the apothecary’s cellar (accessible via a hatch inside a crumbling house).
Search for a hidden door (Perception check required) behind a bookshelf. Inside, you'll find the Necromancy of Thay sealed and unreadable — for now.
2. Find the Dark Amethyst:
Still in the Blighted Village, interact with the old well near the center of the area.
Use a rope to descend into the Whispering Depths dungeon below.
3. Navigate and Prepare for Battle:
Proceed through the Whispering Depths cautiously — it’s crawling with Phase Spiders and poisonous terrain.
Your main target is the Phase Spider Matriarch, a formidable boss near a glowing chasm.
4. Defeat the Phase Spider Matriarch:
Use ranged attacks and crowd control to avoid her high-damage teleport strikes.
After defeating her, explore the area near the chasm.
5. Collect the Dark Amethyst:
The Dark Amethyst is found on a corpse close to the glowing fissure where the Matriarch was located.
6. Return to the Tome:
Go back to the cellar where the Necromancy of Thay is located.
Interact with the tome and choose “Place the amethyst in the slot on the book’s cover.”
⚠️ Important Tips
Reading the Tome: Only certain characters can attempt to read it successfully — usually those with a high Wisdom or Intelligence score. If you fail the check, you may face negative effects.
Benefits of Unlocking: Reading the Necromancy of Thay grants permanent bonuses to your character and unlocks powerful necromancy-themed spells.
More Readings Later: You’ll get additional chances to read more pages later in the game — so don’t worry if you can't read it immediately.
📍 Quick Summary
Objective Location Key Item Enemy to Defeat
Unlock the Necromancy of Thay Blighted Village cellar Dark Amethyst Phase Spider Matriarch
By following this updated, concise guide, you’ll successfully unlock and harness the forbidden power of the Ancient Tome in BG3.