Zero-Tails Sealing Technique

The Zero-Tails Sealing Technique is an unique form of sealing which was passed down in the Land of the Sky and used to seal (or restrain) the Zero-Tails.

Overview
This technique seems designed to utilise the dark chakra generated by Zero-Tails rather than seal it. This technique seems very complex sealing technique, caused by many preparations to do before, judged by many sealing formulas or sigils scribed in the sealing room and a huge tablet used to restrain the beast.

It's unknown how this technique works, but after the Zero-Tails was sealed, the seal encased Zero-Tails like a cocoon and some body extensions grown and provide the Zero-Tails to generate dark chakra and transfer dark chakra created through the Ancor Vantian. This technique also protect Zero-Tails by absorbing any chakra from external sources which can harmed the Zero-Tails.

After Sasuke learned and known the mechanics of this technique, he broke the seal by destroyed the tablet that restrained the beast and Naruto dealing the death blow to it, the Zero-Tails went berserk and destroyed the entire sky fortress, killing all the Land of the Sky shinobi aboard.

Trivia

 * However, even restrained, Zero-Tails still able to manifested itself, and use its abilities such as sensing negative emotions, possess anyone who is emotionally unstable, heart reading, and feeding upon the darkness within one's heart and create dark chakra.
 * It's unknown if this technique also scribed in Shinnō's scroll. As he stated if his scroll contained how to activate the Zero-Tails.