Home > Baldur’s Gate 3 > Baldur’s Gate 3: How To Use The Brain Jars

Baldur’s Gate 3: How To Use The Brain Jars

Published Date :

Baldur’s Gate 3 is notorious for having in-game items that might not look very useful at the start of your campaign but it would make sense as you go through different acts. And it’s the same case with the Brain Jars that you find lying around on the Nautiloid when you start your journey through the lands of Forgotten Realm. These jars are stuffed with consciousness that players can access with the use of a Mind Archive Interface hidden within the Necrotic Laboratory in Act 2 of BG3.

However, things can be pretty confusing at the start and you might know how exactly to use the Brain Jars in Baldur’s Gate 3. Not to mention, there are several mind jars scattered around inside the laboratory as well in the game. So if you want to know how to use the jars effectively in the game, then here is everything you need to know about them.

How to Use the Brain Jars in BG3

How To Use The Brain Jars In BG3
Image Source: Pheeon on YouTube

Players will come across the Brain Jars in Baldur’s Gate 3 inside the Nautiloid in Act One itself. You will need to store them inside your inventory as you won’t find their use till to enter Act Two in your campaign. To use the Brain Jars, players will have to interact with the Slacked Skin Head sitting atop a Mind Archive Interface hidden within the Necrotic Laboratory in BG3.

You will find the Necrotic Laboratory located in the Mind Flayer Colony in the game. Once you enter Act Two, the Mind Flayer Colony will be under the Moonrise Tower Prison. Players will need to head towards the southeast part of the map to come across the laboratory. The Mind Archive Interface is located at X: 699 Y: -117 in Baldur’s Gate 3.

Once you come across it, all you will need to do is interact with the interface and insert the Brain Jars you found on Nautiloid. The Slacked Skin Head atop the interface will assume the consciousness of the mind inside the jar. It is worth mentioning that players will come across only two jars on Nautiloid while others are scattered around the laboratory.

One of the most useful brain jars named the Waking Mind is located behind the Brain Mapping Puzzle in BG3. Once inserted inside the Mind Archive Interface, the Slacked Skin Head will assume the consciousness of a Githzerai warrior in the game. Likewise, there are a whole lot of brain jars that you will come across scattered throughout the laboratory, and here is a list of all of them:

  • Waking Mind – Behind the Brain Mapping Puzzle
  • True Mind – In front of the Mind Archive Interface
  • Butchered Mind – Found on a shelf inside the Morgue
  • Closed Mind – Found on the shelf inside Ironfinger’s room
  • Fresh Mind – Found on top of boxes beside the elevator
  • Dark Mind – Southeast table on the Nautiloid
  • Slave Mind – Ceremorphosis room on the Nautiloid

That’s everything covered in this guide. If you find this guide helpful, be sure to check out our other guides BG3 Guides section, right here on Gamer Tweak.

  • SLAYER Codes (October 2026)

    SLAYER Codes (October 2026)

    Published Date :

    SLAYER drops you into a world where building your character and getting stronger is the name of the game. You’ll spend time customizing your character, working through the tutorial, and improving your setup as you take on tougher challenges. SLAYER codes can give you some extra Yen and EXP along the way, which can make… Read More

  • +1 Venom Evolution Codes (October 2026)

    +1 Venom Evolution Codes (October 2026)

    Published Date :

    Training your way through +1 Venom Evolution means collecting Wins, unlocking new Evolutions, and pushing through tougher areas as your transformation gets stronger. You can train with Sound Saves, fight enemies, and work toward becoming the strongest Venom in the game. +1 Venom Evolution codes can give you useful boosts, chests, and other freebies to… Read More

  • Anime Mysterious Codes (October 2026)

    Anime Mysterious Codes (October 2026)

    Published Date :

    Anime Mysterious throws wave after wave of enemies at your team, so having the right anime units can make a big difference. You’ll summon new characters, build your lineup, and work out which units are worth investing in as the difficulty ramps up. Anime Mysterious codes can give you some extra rewards along the way,… Read More

  • German Moped Days Codes (October 2026)

    German Moped Days Codes (October 2026)

    Updated Date :

    German Moped Days is all about taking classic German mopeds out for a chill ride, but there’s a little more to it than simply hopping on and driving. You have to kick-start your moped, mix your own fuel, and then hit the road while exploring what the game has to offer. German Moped Days codes… Read More