Artifex Assembler Vats

From Halopedia, the Halo wiki

The Artifex Assembler Vats were a kind of assembler vat used by the highest echelons of the Forerunner Ecumene; dedicated to only Council worthies and the most accomplished of each rate. Each Artifex took the form of a massive complex of specialised and individual factories used for the creation of unique designs, and were guided by the greatest minds available to the Forerunners' civilisation. Those worthy of commanding the Artifex vats held grand titles and honours in the works of the Ecumene.[1]