Dark Sphere

An ability that creates a concentrated ball of pure positive black chakra. This ability seeks out any chakra energy in the area and completely absorbs it. It also eradicates any physical matter it touches. Once it absorbs enough chakra, it breaks down and starts to attack indiscriminately, shooting tree-like branches at all people who are using chakra, but as Amamiya shows, you can stop the attack by stopping your chakra. While powerful, it tax's a lot on the users mind. The size of the sphere can vary due to the amount of chakra it absorbs. The Dark Sphere does not require any hand seals to use, relying only on the chakra control of the user. Once it is complete, it becomes self-sustaining, which does not give the Dark Sphere a definite limit like the Chidori.