You can upload an icon for this item to File:Icon - Eternal Hammer.png or link to an existing icon from File:Icon - Eternal Hammer.png using code like #REDIRECT [[File:icon_filename.png]]. The icon should be in PNG format. You can override the default name using the iconname field of this template (not advised as it negates the automatic display of the icon by the itemlink template).
You can upload an image showing how this item appears in-game when used to File:Portrait - Eternal Hammer.jpg. Please remember to crop the image to avoid as much UI and non-relevant game background as possible, and it should be in JPG format. You can override the default name and/or image format using the portraitname field of this template.
