Nimrods are weapons that are formed when Hand Shakers charge. They are mainly used when Hand Shakers are dueling each other for the right to battle god. The concept of a Nimrod varies from Hand Shakers as one cannot be exactly the same. It may also be possible that the Nimrod's overall design and concept may depend on the personality of the Hand Shaker (Eg; Tazuna likes to fix machines, his Nimrod turned out to be a sword made out of gears).