b'omarr monk
The B'omarr Order, which consisted of B'omarr monks, was a religious order that believed in isolating themselves from all physical sensation to enhance the power of their minds. To that aim, enlightened monks had their brains transplanted into nutrient-filled jars. Whenever they wanted to move, those bottled-brains used spider-like droid walkers. Older monks used four-legged walkers, but younger monks used a six-legged variant.
The order possessed multiple regeneration gems, which at the time of Jabba the Hutt were stored underground behind triple doors.
The B'omarr Order first appeared in the 1983 film Star Wars: Episode VI Return of the Jedi.