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 the 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 try "mind blasting" their opponents and then try to batter their strong arms on the weaker enemies. The Brain golems are protected by a force field on the inside, similar to the spell Mage armor.