Mowzie's Mobs: The Broken Blade
This client-side mod provides the ability to customize the sword located on the back of the Ferrous Wroughtnaut. In configuration files, you can select any item that has a registry name to replace the default diamond sword.
Some items may display in non-standard ways, as shown in the example with Cataclysm - The Incinerator:
Additional Information
A video demonstrating the mod's capabilities is available:
