Baldur's Gate 3 is rife with challenging battles, and tricky quests. However, saving the Grymforge Gnomes is probably one of the hardest. They are watched by a city full of Duergar, and a Drow named True Soul Nere. Furthermore, the only way to save them appears to be a confrontation with their oppressors.
Baldur's Gate 3: How To Rescue The Grymforge Gnomes
If you're trying to rescue the Grymforge Gnomes from True Soul Nere in Baldur's Gate 3's Underdark, this guide can help.