Core Guardian
First things first, Eisen began to place the different parts together in the right way so that he properly knew which ones belonged to which part of the Core Guardian's Body, and then slowly and carefully began to construct the body. Overall, it seemed to be created in a way that the inside was mostly made up of crystal and glass structures, as well as incredibly functional areas, and the outside was made up of different types of metal as a casing, the inside of those different metal plates were all covered in different types of enchantments.