How To Get To The Other Side Of Oubliette In Baldur’s Gate 3

Mind Flayer's colony has a secret Oubliette in Baldur's Gate 3 which serves as hiding spot of Ketheric Thorm. Let us guide you through this dungeon while tackling its dangers.

After fighting Ketheric Thorm for the first time at the top of the Moonrise Towers, he ends up running away through a hole made by the Absolute in BG3. This hole leads to the Oubliette area of Baldur’s Gate 3. You need to jump down that same area and chase Ketheric. Oubliette is a very confusing maze-like area and once inside it, players can get confused about reaching its other side, as every corridor of this Mind Flayer colony looks the same.

If you are stuck inside Baldur’s Gate 3 Oubliette and have no clue, allow us to help you get to the other side with our detailed walkthrough.

How to get into the Oubliette in Baldur’s Gate 3

The right way to go into the Oubliette in Baldur’s Gate 3 is through progressing through the main story quest. You can access Oubliette once you defeat Ketheric Thorm for the first time during Act 2. After defeating him, Ketheric will run away. You will find a red glowing hole in one of the moonrise towers (X: -130, Y: -180). Jump into the hole at the top of the Hollow Tower, and you will reach Mind Flayer Colony, Oubliette. Inside the colony, you can also pick up the Chop! Chop! Chop! side quest.

If you kill Chop or convince him to give you the key, you can open a nearby cage to free an Intellect Devourer. This Intellect Devourer can then be used as a Familiar and can be summoned whenever you want.

How to reach the other side of the Oubliette

Once you enter The Mind Flayer Colony, you need to find Ketheric Thorm. The Colony is composed of a lot of rooms and is full of Mind Flayers. Explore the area. Ketheric can be found along the path between Bonedaughter and Necrotic Lab. There is an elevator that will take you to him. Before proceeding, we recommend that you complete the Necrotic Laboratory puzzle. The only way to reach the other side of Oubliette in Baldur’s Gate 3 is by defeating Ketheric Thorm once and for all. We have also included a marked map for Oubliette for your convenience.

Surprisingly, it is possible to get inside the Oubliette long before the Kethric Thorm boss fight when you first visit the Moonrise Towers during Act 2. However, if that happens, you will be stuck inside the Oubliette as there is nothing to do here. If you find yourself stuck in the Oubliette, look for membrane walls that you can break down. Opening them up will allow you to leave the Oubliette so you can return when the time is right.

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Ali is a passionate RPG gamer. He believes that western RPGs still have a lot to learn from JRPGs. He is editor-in-chief at but that doesn't stop him from writing about his favorite video ...