Thirteen Strictures

Aware of the strictures placed upon the holy sword, thinking “such a form is beautiful,” the holy spear accepted those same limits. Just as the holy sword, it carries within it the prayers of thirteen knights.
Furthermore, in the illustration of the Thirteen Strictures included in the Rail Zeppelin case, the image of Bedivere included his prosthetic arm. This arm was created for him by a blacksmith he knew, for use when he attended ceremonies. For him, actions taken by the Round Table required the utmost in respect and decorum. Whether the silver arm that appeared in a parallel world was modelled after this one or not, well…

Lord El-Melloi II Case Files material: Lord El-Melloi II Case Files Glossary