Gravity Metal

Gravity Metal is a unique ore that is found all over and is rarely used, despite its properties.

Description
This golden colored metal is extremely tough and not too heavy or very light either and on the surface it is a metal that would seem perfect for making a shield and armor out of. In addition, to its toughness it is one of the countless types of metal capable of absorbing chakra and using it to repair and harden itself. However, at the same time chakra makes it extremely heavy. The more chakra it absorbs the heavier it gets and this single reason is why the metal is rarely used and why many see it as ill suited for combat. Many shinobi and smiths believe that benefits the metal has to offer does not outweigh the drawbacks of using it. Not to mention how there are countless of other ores capable of absorbing chakra just like gravity metal can if not better and without any side-effects.

More than 50% of the small population of shinobi who do use it come from the Kaneko Clan. The shinobi in the Kaneko Clan often make arm braces, gauntlets, or greaves out of this metal for training and combat. For training they use this metal for weight training. In combat they use the metal to grant them the ability to easily influence the weight of their limbs to enhance the power of their strikes by infusing chakra into the metal to make it heavy. Their long history with the metal has allowed them to learn how to flow it out of it to return it to its original weight, which is a piece of knowledge that they keep secret.