Shadow Hands

The Zero-Tails and its host can create a multitude of materialized spirits from their body or vicinity that chase after the opponent. The arms can also absorb chakra from the opponent or any ninjutsu upon contact. When used by Shinnō, he could also form a wall to shield himself with these arms, enough to block Naruto's Tornado Rasengan. The materialised spirits are composed almost entirely of spiritual energy, so the chakra is in an unstable state. Therefore, they crave physical energy, so they hunt for their prey endlessly. Physical attacks do not harm them, as they'd simply phase right through, consuming the chakra of the individual.