By creating wolves from his Dark Release chakra, Zeta creates this technique. He created this animal from his chakra.
He can create smaller shadow wolves, but uses this summons different, for massive opponents, a massive number of opponents or massive needs. This summoning, can use attacks, like a tailed beast ball, but instead of the tailed beast energy, it uses darkness like energy. Black smoke like gas, flows around the animal. The animal has red eyes. Zeta's control cannot be lost with the contract seal. The animal resides in a secret shadowy valley. It's only weakness is Light Release.