Welcome to NGB and our Baldur’s Gate III guide for the Underdark Quests.
Underdark Quests
The Underdark is one of the last areas you’ll come to in Act I of Baldur’s Gate III. There, you’ll find a handful of side quests you can complete for rewards to help your party on the way to the Moonrise Towers.
In the table below, click the links to find a walkthrough for each of these Underdark quests. For the smaller quests, you’ll find their walkthroughs below the table while longer quests will link to their own pages.
| Quest | Obtained |
|---|---|
| Avenge Glut’s Circle | Speak with Sovereign Glut at Myconid Colony |
| Cure the Poisoned Gnome | Speak with Thulla at Myconid Colony |
| Defeat the Duergar Intruders | Speak with Sovereign at Myconid Colony |
| Deliver Nere’s Head / Free True Soul Nere | Complete the Defeat the Duergar Intruders quest |
| Find the Mushroom Picker | Speak with Derryth Bonecloak at Myconid Colony |
| Help the Cursed Monk | Travel to the Adamantine Forge |
| Save the Grymforge Gnomes | Complete the Cure the Poisoned Gnome quest |
| The Adamantine Forge | Defeat Filro the Forgotten, loot him, and read the Scribble notes |
Avenge Glut’s Circle
Sovereign Glut can be found on the west side of the Myconid Colony. Speak with him after talking to Sovereign, and he’ll request to accompany the party in defeating the Duergar. Bring him with you when you head to the abandoned village southwest of the colony.
After defeating all of the Duergar, speak with Glut. He’ll say he plans on using the enemies you just killed to form a new colony and that the other Sovereign must be killed. You can side with Glut or kill him to save the other Sovereign.
We chose to strike Glut down since he was giving us villainous vibes. Doing this starts a battle with the shroom and any of the Duergar you converted during the fight. He also has an increased health pool when fighting against the Duergar.
Defeating him completes the quest. If you return to Sovereign Spaw, he’ll give you a fancy title.
Cure the Poisoned Gnome
The gnome Thulla can be found in the Myconid Colony near Sovereign. Speak with her and choose “Who did this to you?” to get additional options. From there, you’ll want to do the Medicine skill check. Passing that will allow you to examine her more closely to determine that a regular antidote will do the trick.
Give her one to cure the poison, which will lead to more dialogue. She’ll tell you that her people are in trouble and she needs to help them. You can say that sucks or offer to help.
If you do the latter, she will give you rare Boots of Speed, and the quest will be completed. If you can’t pass the check, then you’ll need to follow the Defeat the Duergar Intruders quest, which requires you to take down the leader of the group, Gekh Coal. He will drop a Duergar Antidote that you can use to save the gnome.
Save the Grymforge Gnomes
This is a timed quest once you reach Grymforge. If you do a long rest, Nere will die automatically and you will not be able to save the gnomes.
You’ll get this quest after completing the Cure the Poisoned Gnome quest and agreeing to help her people. See the Deliver Nere’s Head / Free True Soul Nere quest above on how to complete it.
Additional Baldur’s Gate III Guides
For more content on Baldur’s Gate III, be sure to check out our Baldur’s Gate III Guides and Walkthroughs page.