The Brain Golems are believed to be the fruits of Mind Slayer experimentation. Servants who obey their every wish and can't be turned against them. They are an amalgamation of brains from different creatures, held together by psychic power that also serves as a form of armor akin to Mage Armor. It is believed that the "head" of the golem is made of a bud from the elder brain.
 
Unpainted Model
Comes in 1 solid piece with little to no cleanup needed before priming.
 
Artist: Rocket Pig Games