Boss Guide · Baldur's Gate 3
How to Beat The Elder Brain (Netherbrain)
hard
Weak to:NetherstonesAnti-psychic effectsBurst damage
About The Elder Brain (Netherbrain)
The final boss. A Crown-empowered Elder Brain atop the transformed Netherbrain. Multiple phases with mind flayer allies.
Attack Phases
1
Crown Guardian
Fight through dominated thralls and Nautiloid defenses to reach the brain.
- ›Psychic blast
- ›Tentacle slam
- ›Dominated ally attack
- ›Mind blast cone
2
Netherbrain
Use the Netherstones to resist domination and damage the brain directly.
- ›Mass domination attempt
- ›Necrotic tentacles
- ›Psionic storm
- ›Reality warp
Rewards
- •Game ending
- •Crown of Karsus (choice)
Weaknesses
NetherstonesAnti-psychic effectsBurst damage