Brain golem

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A brain golem was an eight-foot-tall humanoid-shaped construct made entirely of brain tissue with a bud of an elder brain for a head. These creations existed only to serve an elder brain and its illithid community. They did not communicate in any way and only reacted to the telepathic orders of mind flayers, and could not attack any mind flayer.

Combat
The brain golems tried "mind blasting" their opponents and then tried to batter their strong arms on the weaker enemies. Brain golems were protected by a force field on the inside, similar to the spell mage armor.