This quest, given by Lars Heyton, requires you to retrieve a Cannith Crystal from the Sahuagin lair. This dungeon is slightly more complex than The Grotto, introducing simple puzzles and more varied enemy encounters. You'll need to navigate through several interconnected caves, often requiring you to find keys or activate mechanisms to open new paths. The Sahuagin here might include spellcasters or archers, so be prepared for ranged attacks. The Cannith Crystal is usually found in a central chamber, often guarded by a stronger Sahuagin leader. Once you have the crystal, return to Lars Heyton in Korthos Village. Remember to use your healing potions if your health gets low.
