|Alignment||Lawful evil, Neutral evil, Chaotic evil|
|Homeland||Mind flayer regions|
|Languages||Undercommon (if they can speak)|
Brain golems are a type of golem made up of brains created by the mind flayers.
Their entire structure is made up of brain tissues. The mind flayer created these creatures only for serving the elder brain (the heart of a mind flayer community) or are used for needs in mind flayer communities.