The Junkyard Dog was Sol's most commonly used and well-known weapon during the Crusades. It was considered a "self-subsistence weapon" since he constructed the concrete blade himself with materials that he found on the battlefield, thus didn't require any real maintenance from him. While it had no innate magical properties, it was still powerful enough to cut through Gears and act as a conduit for Sol's fire magic. However, the blade would eventually shatter during Sol's first battle against Justice, where it was incapable of cutting through the Command Type Gear's armor. Sol would later steal the Fireseal as a more efficient replacement.
Years Later, Sol would eventually fuse the Flashing Fang with the Fireseal and branded the combined Outrage weapon the Junkyard Dog MKII/III, out of respect for the original blade.
- Arc System Works 20th Anniversary Character Collection Guide