Delve into the shadowy depths of the Underdark in Baldur’s Gate 3, where danger lurks around every corner and secrets await discovery. This comprehensive walkthrough guides you through hidden passages and treacherous encounters, from navigating the eerie Selunite Outpost to battling formidable foes like the Duergar and Minotaurs. Whether you’re seeking powerful artifacts or trying to complete intricate side quests, our guide will equip you with essential strategies and tips to conquer this dark underworld and advance your journey toward the Moonrise Towers. Prepare for an adventure filled with intrigue, peril, and the thrill of exploration!
One of the passages is located within the Goblin Camp. When you reach the Shattered Sanctum, find the door to the Defiled Temple in the western part of the castle.
Head to the eastern part of the temple and find the room whose interior is illuminated by a beam of light piercing through the ceiling. You don’t have to solve the moon puzzle to unlock the door to Underdark. Find the lever on the wall by passing a Perception skill check and unlock it using the Thievs’ Tools.
After entering the Underdark, you will get to the Selunite Outpost.
You will find the next entrance in Whispering Depths in the Blighted Village. You’ll find the entrance to the Depths in the well in the middle of the village or one of the houses.
Not far from where you will fight the Phase Spider Matriarch is a chasm from which green light is emitted. Bats will fly out of the chasm. You must jump inside to get to Underdark. Just remember to cast the Featherfall spell on all team members first. After landing, you will get to the eastern part of Underground.
The next passage to the Underdark is in the Zhentarim’s hideout on the territory of Waukeen’s Rest. You will find the entrance to the hideout in the small buildings near the barn with bulls. After you get inside the hideout, we advise not to engage in a fight with the Zhentarims. There is plenty of oil and flammable barrels all over building. Therefore, fighting them can quickly result in the death of the entire team.
Find the sleeping wolf named Istor. Next to him, you’ll find a door with an illusion spell imposed on it. Go through the hidden doors. Use the elevator and go down to Underdark. You will find yourself in the north-eastern underground, not far from the Myconid Colony.
The last passage is in Auntie Ethel’s Teahouse in the Sunlit Wetlands. On the page Save Mayrina we have described the quest with the witch in details.
When you arrive at her house, extinguish the fire to get to her hideout. Then interact with the door. You will find out that the door is just an illusion. Go through the door and reach the waterfall. Jump to the other side. Not far from the waterfall are the next doors covered with an illusion. Behind them you will find a green portal leading to the southern part of Underdark.
If you cannot get through the door, try putting on the masks found at the first wooden doors.
What to pay attention to in Underdark?
In the Underdark of Baldur’s Gate 3, players should pay close attention to several critical elements that can significantly impact their exploration and survival. Traps are prevalent, so equipping tools to disarm them is essential; characters automatically perform Perception checks when approaching traps, and some can be neutralized with ranged attacks or fire spells. Additionally, the environment is filled with dangerous creatures, including Duergar and various bosses like the Spectator and Bulette, requiring strategic positioning and teamwork to defeat. Players should also be mindful of quest opportunities, such as helping Omeluum or finding unique items like the Sussur Bark, which are integral to advancing in the game. Overall, careful navigation and awareness of surroundings will enhance the Underdark experience.
The Underdark is divided into several regions, including 4 Waypoints. When entering the Underdark, your team should be at least level 4. You will encounter many tough enemies and minibosses there.
- Myconid Colony – here, you unlock side quests: Find the Mushroom Picker, Help Omeluum investigate the Parasite, and Defeat the Duergar Intruders. There are 2 merchants in the colony.
- Selunite Outpost – the entrance to the outpost is guarded by two statues. There is a minotaur at the gate.
- Arcane Tower – the entrance to this location is guarded by 2 magical turrets. To thoroughly explore all floors of the tower, you must first fix the broken elevator. You will find here the ingredients needed to complete the side quest: Help Omeluum investigate the Parasite and a lot of loot.
- Beach – here, you will find a ship that will take you to the Grymforge and the Find the Missing Boots quest. In the forge, there is a passage to the Moonrise Towers, which is the beginning of the second act of the game.
- Sussur Tree – here you will find the Sussur Bark, an item associated with the side quest: Forge a Master Weapon.
- The Festering Cove – it’s a secret location in Underdark.
The underground is also full of various traps. Equip yourselves with tools to disarm traps, and remember to move carefully. When your character approaches the trap, they will automatically perform a Perception check.
Some traps can be shot down with a regular arrow or a fire ball. You can set fire to the poisonous gas cloud and wait for the danger to be gone.
How to advance to Act 2?
To advance to Act 2 in Baldur’s Gate 3, players must successfully navigate the Underdark, a perilous area filled with challenges and quests. First, ensure you have completed the “Rescuing the Druid Halsin” quest, as this unlocks the path to the Underdark. You can access it through various routes, including the Goblin Camp via the Shattered Sanctum, where you’ll need to defeat remaining enemies and solve a few puzzles to unlock hidden doors. Once inside the Underdark, focus on completing key quests such as “Travel to Moonrise Towers” and assisting characters like Omeluum and the Mushroom Picker. Successfully completing these tasks will ultimately lead you toward the transition into Act 2, setting the stage for further adventures in the game.
If you want to skip side quests and quickly finish Act 1, go to the beach, defeat the Duergars, and use the ship to get to Grymforge. From there you will be able to use the elevator, which will take you to the Moonrise Towers.
Find the Mushroom Picker
Finding the Mushroom Picker is a crucial side quest in Baldur’s Gate 3’s Underdark, where players must assist Omeluum in his investigation of a peculiar parasite. To locate the Mushroom Picker, adventurers need to navigate through the treacherous terrain of the Underdark, filled with dangerous creatures and environmental hazards. The quest not only tests players’ combat skills but also their ability to solve puzzles and engage with various NPCs. Successfully completing this quest will deepen the player’s understanding of the Underdark’s lore and provide valuable rewards that enhance their journey through this mysterious realm.
In the colony, you will find a trader named Derryth, who will ask if you have seen her husband. If you answer negatively and ask a few additional questions, you will unlock the quest Find the Mushroom Picker.
Go to the place marked on the map. Upon approaching the cave with green mushrooms, a conversation with Baelen will begin. You can help him in several ways:
- If you have the Misty Step scroll with you, throw it to him performing a Strength check.
- Cast a fly spell on the dwarf.
When Baelen is able to escape from the trap, he will thank you and give you an invisibility scroll in return. Return to Derryth and collect the reward, the Gloves of Uninhibited Kushigo.
Help Omeluum investigate the Parasite
Help Omeluum investigate the Parasite is a crucial side quest in Baldur’s Gate 3 that delves into the mysterious occurrences within the Underdark. Players will assist Omeluum, a curious and somewhat eccentric character, in uncovering the nature of a strange parasite affecting various creatures in the area. This investigation not only reveals significant lore about the Underdark but also presents players with unique challenges and encounters. As you progress through this quest, you’ll need to gather information, engage in dialogue with various NPCs, and potentially confront hostile entities influenced by the parasite. Successfully navigating this quest enhances your understanding of the Underdark’s ecosystem and its hidden dangers.
In the Myconid Colony, there is a trader named Blurg. During the conversation with him, tell him about your problem with the tadpole. The merchant will summon the Mind Flyer – Omeluum.
When talking to Omeluum, tell him that you want to get rid of the tadpole. Unlock the quest: Help Omeluum investigate the Parasite. You will have to bring him 2 ingredients that you will find in the Arcane Tower, in the southwestern part of Underdark.
When you return to him with the acquired ingredients, Omeluum will create a potion for you. After drinking, you will be able to pass several ability checks to unlock new Illithid powers. Removing of the tadpole will fail, and the task will be completed.
After drinking the potion, you can buy (or obtain through intimidation) a remarkably useful item from Omeluum called the Ring of Mind-Shielding, which protects against Charm. This ring will be very useful in the fight against Nere in Grymforge.
Arcane Tower – how to destroy turrets and run the elevator?
To successfully navigate the Arcane Tower in Baldur’s Gate 3, players must first disable the turrets that guard its entrance and interior. The turrets can be neutralized using Sussur Blooms, which create an antimagic field, or by dealing lightning damage, as they are particularly vulnerable to it. Once the turrets are dealt with, players can access the tower’s generator located in the basement. To power the elevator, simply combine a Sussur Bloom with the generator. This will not only activate the elevator for easy access between floors but also deactivate any remaining turrets, allowing for safe exploration of the tower’s treasures and secrets.
The Arcane Tower is located in the southwestern part of Underdark. To get inside and examine all its floors, you must first deactivate the turrets and activate the elevator.
The turrets will shoot anyone who tries to approach the door. They can be deactivated in two ways:
- Throw the Sussure Flowers near the turrets, which you can find near the Sussur Tree to the north of the Tower;
- or use any electric spell and inflict enough damage on them.
When the turrets are no longer a threat, you can go to the Tower and start the elevator.
Cast the Fly or Featherfall spell on one of the characters and approach the turret near the statue. Jump on the giant mushrooms at the back of the Tower. Pick up the Sussure Flowers and use the lockpick to open the back door to the Tower.
Approach the generator and put a flower into it. The elevator in the Tower will be unlocked. Go up the stairs to the elevator and go up 2 floors. Open the main door of the Tower and let the rest of the team inside.
Arcane Tower – what can you find there?
The Arcane Tower in Baldur’s Gate 3 is a captivating location filled with secrets and valuable loot. As you explore this towering structure, you’ll encounter powerful Arcane Turrets that guard its entrance, requiring clever tactics to bypass or disable them using Sussur Blooms. Inside, players can uncover various items essential for side quests, including crafting materials and weapons. The tower also features environmental storytelling elements, such as books that provide clues for solving puzzles, notably the riddle posed by the automaton Bernard at the top. Additionally, a hidden basement contains even more treasures, including the coveted Staff of Arcane Blessing, making the Arcane Tower a must-visit for adventurers seeking to enhance their journey through the Underdark.
On the lowest floor of the Tower, you will find a chest with the Uncovered Mysteries necklace, several books, potion ingredients, and healing potions.
On the first floor of the Tower, you will find Timmask Spores and the Tongue of Madness and ingredients for the Help Omeluum Investigate the Parasite quest.
On the 2nd floor, you will find an Gilded Chest on one of the balconies. When you take all the items out of the chest, you will receive several valuable things, including the Mystra’s Grace boots, which provide Featherfall.
On the 3rd floor, you will find a chest with the Mage’s Friend ring and many books and scrolls. You will also find a mysterious button by the window. To solve the puzzle with the button, you need to dig up the content of a grave north of the Arcane Tower first. You will find a Dog Collar there. When you put on the collar and press the button, a piece of meat will pop out of the hole.
On this floor, you will also find an Engraved Githyanki Disc on one of the bookshelves. If Lae’zel is in your party, after examining the item, you will unlock a new conversation with her.
On the top floor you will encounter robots. You can defeat them in battle or receive an item from them if you choose the correct dialogue options. You will need 3 books for this conversation:
- Threadbare Book – lies on a shelf on the 1st floor.
- Dusty Book – an open book that lies on the desk on the 2nd floor.
- The Roads to Darkness – it’s on the desk on the 3rd floor.
Read all these books, and during the conversation with Bernard, always choose the first possible answer. On the table by the robots, you will find a Guiding Light ring. Put on the ring to discover a button in the elevator that leads to the basement.
Go down to the basement and search all the bookshelves. Don’t forget to take the Staff of Arcane Blessing. In the chest, you will find several scrolls, arrows, and the Sparkswall ring.
Find the Missing Boots
In the quest Find the Missing Boots, players are tasked with locating a pair of boots that are crucial for progressing through the Underdark. This side quest begins in the Decrepit Village, where you’ll first learn about the lost footwear. As you navigate through the treacherous terrain of the Underdark, be prepared to face various enemies and environmental challenges. Successfully retrieving the boots not only aids in your journey but also enables you to interact with certain Duergar patrols, who will grant you passage if you present them with the recovered item. Keep an eye out for clues and hidden paths as you explore this dark and mysterious area.
You will unlock the Find the Missing Boots quest on the beach in Underdark. As you approach the ships, a Duergar will accost you. Take any ability check, then ask about the boots. Propose help in finding the gnome.
You will find the gnome in the Mykonid colony, she will be lying on a large mushroom. Talk to her and offer help in exchange for boots. When you return with the boots to Duerger, he will let you use the ship, which will take you to Grymforge.
Cure the Poisoned Gnome
In the Cure the Poisoned Gnome quest of Baldur’s Gate 3, players encounter Thulla, a deep gnome suffering from a severe poison wound inflicted by the Duergar. Located at the Myconid Colony in the Underdark, Thulla’s condition requires immediate attention, as she must be cured within three long rests to avoid death. Players can utilize spells like Lesser Restoration or find an antidote from Gekh Coal, a Duergar in the area. Successfully curing Thulla not only saves her life but also unlocks further quests related to her clan, offering rewards such as the Boots of Speed. This quest serves as a pivotal moment in the game, connecting various narrative threads and enhancing gameplay dynamics.
In the Mykonid colony, you will find the gnome named Thulla. Give her the antidote to save her from dying. If you don’t have an antidote with you, try visiting the nearest trader. Antidote is a very common item in the game.
From Thull you will receive another quest – Save the Grymforge Gnomes. The grateful gnome will give you the Boots of Speed, which the Duergar is looking for by the ships on the shore.
Defeat the Duergar Intruders
In the depths of the Underdark, players must confront the Duergar Intruders, a formidable foe lurking in the shadows. These dark dwarves are known for their cunning and ruthlessness, often employing ambush tactics to catch adventurers off guard. To successfully defeat them, players should leverage their party’s strengths, utilizing strategic positioning and powerful spells. Engaging in this battle not only tests combat skills but also offers valuable loot and experience, essential for progressing further into the treacherous underground realm. Prepare for a challenging encounter that will require both strategy and teamwork to overcome.
In the Mykonid colony, on a large mushroom stands Sovereign Spaw. You will receive a quest from him – Defeat the Duergar Intruders. He will ask you to eliminate the Duergars from Underdark beach.
Go to the beach and attack the dwarves. When the battle starts, more opponents will appear. The strongest enemies will be on the 7th level.
One of the dwarfs will drop the Exterminator’s Axe, which deals a lot of damage from poison and fire.
Return to the mushroom colony and speak with the Sovereign Spaw. As a reward, you will receive an Envoy’s Amulet, and he will open a secret room for you located in the colony next to the trader Derryth. There will be several scrolls and a Shadow of Menzoberranzan helmet. There are a lot of potion ingredients near Drowa’s body, and you will also find the book Flumph Mating Rituals. Read the book and take the ability check to get to know the secret of the forge.
Selunite Outpost
The Selunite Outpost serves as a critical entry point into the Underdark in Baldur’s Gate 3. Accessible through the Temple of Selune, players encounter a foreboding atmosphere characterized by powerful guardian statues and various treasures. Upon entering, adventurers must navigate a series of challenges, including disabling the statues that protect the outpost and unlocking doors using Thieves’ Tools. Inside, players can find valuable items such as the Helmet of Smiting and other gear essential for their journey. The outpost not only sets the stage for further exploration but also introduces players to the dangers and mysteries that lie deeper within the Underdark.
If you got to Underdark through the outpost, wait until the statues at the gate kill the minotaur. If you want to get inside the outpost, you can cast the Fly spell on yourself and try to jump in through the open window.
When you’re inside, shoot the stone on the statue which emanates light. The statues at the gate will be deactivated. Next, open the gate with a lockpick and let the rest of the team in.
In the chest by the campfire, you will find the perfect gear for the Paladin, the Helmet of Smiting. In the remaining chests there will be some gold, Thieves’ Tools, and tools for disarming traps.
Spectator
The Underdark in Baldur’s Gate 3 serves as a treacherous underground realm filled with secrets, challenges, and unique encounters. This vast network of caverns beneath the Blighted Village offers multiple entry points, each leading players into a world teeming with formidable foes and intriguing quests. As adventurers navigate through areas like the Selunite Outpost and the Dread Hollow, they will encounter various enemies, including duergar and minotaurs, while uncovering valuable items and lore. This walkthrough aims to guide players through the intricacies of the Underdark, highlighting essential strategies and tips to survive and thrive in this dark underbelly of the game.
Spectator is a boss in BG3, which can be encountered in several ways. It’s best, however, to confront him in Underdark, near the Selunite Outpost. Here’s how to start a fight with the boss.
Not far from the outpost lies several petrified drows. Attack one of them to awaken the Spectator.
To gain an advantage over the strong opponent, we recommend positioning the team thoughtfully and starting the fight standing on the balcony of the outpost.
Spectator has many powerful attacks and can perform several actions in his turn. If your team is at least level 4, you should quickly deal with him using magical arrows. The defeated opponent will drop the Spectator’s Eyes necklace, which has the spells Ray of Fear and Wounding Ray.
Phalar Aluve sword
The Phalar Aluve is a unique +1 Magic Longsword found in the Underdark of Baldur’s Gate 3, specifically near the Selunite Outpost. This sword, notable for its striking design and runic inscriptions, offers both aesthetic appeal and formidable combat capabilities. It deals 1d10 slashing damage when wielded with two hands (1d8 with one hand) and provides a +1 bonus to attack rolls and Performance checks. Its special abilities, Shriek and Sing, allow players to debuff enemies or buff allies, respectively, making it a versatile choice for various character builds. To claim the sword, players must navigate challenges that require either brute strength or religious knowledge, with specific advantages for Drow characters and Clerics of Eilistraee.
Between the Selunite Outpost and the Mykonid colony, you will find a sword in the stone. To remove it, you must pass a strength or intelligence check and sacrifice a few drops of your blood. The long sword Phalar Aluve is a finesse weapon dealing 5-14 damage 4 slashing damage.
Minotaurs
Minotaurs in Baldur’s Gate 3 represent a formidable challenge for players navigating the treacherous depths of the Underdark. These powerful creatures are known for their brute strength and aggressive nature, often serving as guardians or obstacles within various locations, such as the Selunite Outpost. Players may encounter a Minotaur while exploring this area, where they can witness the creature being swiftly dispatched by the powerful guard statues that protect the outpost. This encounter serves as a stark reminder of the dangers lurking in the shadows of the Underdark, where combat prowess and strategic planning are essential for survival against such formidable foes.
In Underdark, you can meet a few Minotaurs. A fight with these beasts shouldn’t be too difficult if your team is at least level 4.
If you use the passage to the underground from the Whispering Depths side, you can immediately encounter 2 Minotaurs. During the fight, make sure all characters in your team are not standing too close to each other. Minotaurs can make a long jump and attack several opponents at once.
Bulette
The Bulette is a formidable creature found in the Underdark of Baldur’s Gate 3, known for its burrowing abilities and aggressive nature. Often referred to as a “land shark,” the Bulette is characterized by its armored hide and powerful jaws, making it a significant threat to unsuspecting adventurers. Players will encounter this beast during their exploration, requiring strategic combat tactics to overcome its brute strength and devastating attacks. Engaging with a Bulette not only tests players’ combat skills but also highlights the perilous nature of the Underdark, where survival hinges on both preparation and teamwork.
An earthquake? No, it’s just another boss in BG3 – Bulette. You may encounter this strange monster between the Whispering Tree and the beach in Underdark.
Bulette can suddenly jump out of the ground and instantly knock down several members of your team. The monster has a sturdy armor and can easily dodge most attacks.
If you want to defeat the boss quickly, position all team members in the four corners of the battlefield so that each character attacks him from a different side. Use the strongest spells, such as Magic Missile and Poison Ray.
The defeated enemy will leave behind the Bloodguzzler Garb, the perfect clothing for a barbarian.
Festering Cove
The Festering Cove is a notable sub-area within the Underdark in Baldur’s Gate 3, characterized by its eerie atmosphere and treacherous terrain. This region is teeming with dangerous creatures and environmental hazards that challenge even the most seasoned adventurers. Players can expect to encounter various enemies, including Duergar and other Underdark denizens, while navigating through the cove’s twisted pathways. The area is also rich in lore and hidden treasures, making it a significant stop for those seeking to uncover the secrets of the Underdark and enhance their character’s capabilities. As players explore the Festering Cove, they will need to remain vigilant, as threats can emerge from the shadows at any moment.
If you want to discover all the secrets of Underdark, you must visit Festering Cove. You won’t find many valuable items there, but you can become a god for a merry bunch of fishfolks!
A hidden path leads to the cove, not far from the place leading to Auntie Ethel’s hut. First, shoot all the traps, then jump over the mushrooms to the other side and descend the rock.
A conversation with the inhabitants of the cove can be conducted in several ways. You can fight with them and their ‘god’ or negotiate with their leader and get the Sickle of BOOOAL from him.
There is also a third, much more enjoyable option – after a successful ability check, you could be claimed as the new god of fishfolks! Sounds good? Here’s what needs to be done:
- For this conversation, choose a character with the greatest intelligence and charisma.
- At the beginning of the talk, you have to pass an automatic Nature check.
- Choose the first dialogue option where you accuse their false god.
- Take the chosen ability check for persuasion, strength or intelligence.
- When the illusion disappears, choose the first dialogue option and ask about the power.
- Choose the first dialogue option again and say you will kill him and take the power for yourself.
When you defeat the redcap, the fishfolks will claim your character as their new god. And that’s it. Unfortunately, you will not receive any great reward for this, and you also will not find too many valuable items in the bay, except for a few shells and starfish. And fish, of course.
What are the main challenges when exploring the Underdark in Baldur’s Gate 3
Exploring the Underdark in Baldur’s Gate 3 presents a myriad of challenges that can test even the most seasoned adventurers. Here are the main obstacles players will encounter:
Dangerous Enemies
- Varied Foes: The Underdark is home to a range of formidable enemies, including Duergar, Spectators, and deadly wildlife. Players must be prepared for ambushes and tough battles against these foes, which often require strategic positioning and teamwork to overcome.
Environmental Hazards
- Explosive Flora: The area is filled with hazardous mushrooms like Torchstalks, which can explode when disturbed, causing significant damage to characters. Players need to navigate these carefully or use ranged attacks to eliminate threats from a distance.
- Traps and Terrain: The Underdark features numerous traps, such as poison gas and other environmental dangers that can catch players off guard. Awareness and perception checks are crucial to avoid triggering these hazards.
Navigation Challenges
- Complex Layout: The Underdark consists of multiple interconnected areas like the Selunite Outpost and Decrepit Village. Players must be adept at navigating this labyrinthine environment while managing their resources effectively.
- Locked Doors and Puzzles: Many areas contain locked doors requiring skill checks for lockpicking or puzzle-solving. Failing these checks can lead to missed opportunities or increased difficulty in progressing through the area.
Resource Management
- Limited Resources: Given the underground setting, players may find themselves with limited access to healing supplies and rest points. Managing health and spell slots becomes critical as they delve deeper into hostile territory.
Navigating the Underdark successfully requires a blend of combat prowess, tactical planning, and careful exploration, making it one of the most challenging yet rewarding experiences in Baldur’s Gate 3.
What are the most dangerous creatures in the Underdark
The Underdark is teeming with perilous creatures that pose significant threats to adventurers. Here are some of the most dangerous inhabitants you might encounter:
Top Dangerous Creatures in the Underdark
| Creature | Description | Challenge Rating (CR) |
|---|---|---|
| Beholder | A ten-eyed aberration known for its chaotic destructive powers, including an antimagic cone and various deadly rays. | |
| Aboleth | A massive, intelligent aquatic creature that can control minds and transform victims into servitors. | |
| Demogorgon | The prince of demons, a colossal being with immense power and madness-inducing abilities. | |
| Mind Flayer | A brain-eating creature that can stun and control others with its powerful psionic abilities. | |
| Nightwalker | An embodiment of anti-life that can permanently kill living beings and drain their energy. | |
| Cloaker | A stealthy predator that resembles a cloak, capable of engulfing and suffocating its prey while instilling fear. | |
| Grick | A worm-like monster with deadly beaked mouths and tentacles, adept at ambushing unsuspecting adventurers. | |
| Drider | A drow transformed into a spider-like creature, combining physical strength with spellcasting abilities. | |
| Purple Worm | A gargantuan creature that burrows through the earth, capable of dealing massive damage with its powerful attacks. | |
| Bodak | Undead horrors created by Orcus, known for their terrifying presence and ability to drain life from their victims. |
These creatures not only present formidable combat challenges but also require strategic thinking and teamwork to overcome. Each encounter can significantly impact the course of your adventure in the dark depths of the Underdark.
