Potential Shikai abilities
Destroying his Saketsu did nothing
"Hikone raised the palm of his hand and shot a point-blank Cero towards Hisagi. Unsurprisingly, the Cero hit him directly. There was a clean hole through his chest, his heart was lost; and so was his Saketsu. This time, Hikone appeared to be in a state of agitation.
His area of influence was starting to become warped
"That Shinigami's change is not the only thing that has been altered around here."
"What do you mean?"
Asked Neliel. Halibel was concerned about their surroundings.
"The reiatsu of this entire area is being repainted into a different form."
The chains pull his organs back and reassemble his body.
The cross-sections of the body organs of Hisagi, which had been hacked off, were each connected by a jet-black chain; a chain for every wound. A sound seemed to ring out from the chains as they pulled together the body organs and re-assembled Hisagi's body into its original form. .
Potential Bankai abilities
How it changed the area of his Bankai's influence
Upon viewing this mysterious sight before him, Hikone became more puzzled than ever. To fumble around for what kind of ability this Bankai has, Hikone extended his reikaku over the surroundings. However, that only served to convey to Hikone a queer sense of reality.
No reiatsu was felt.
Once the raging black wind had stopped a moment ago, the movement of the air had completely vanished from the environs. As if to match it, the shimmering of all reiatsu had disappeared as well. The reishi of the Kyogoku, which is far more markedly pronounced than that of Soul Society and Hueco Mundo, had halted all forms of movement as though time itself had stopped.
But this phenomenon was limited to the ground and the ambient atmosphere. Aura could still expand her reiatsu towards the sky and the ominous reiatsu that could be felt from Kenpachi was still intact. Hikone no longer knew what was going on anymore, so he decided to attack Hisagi directly, disregarding his opponent's appearance.
Destroying Hisagi's entire body doesn't stop it.
Thinking he could obliterate Hisagi completely, Hikone shot a full-powered Cero, hoping to wipe out Hisagi's entire body. When the light cleared, Hisagi was still alive and whole.
Destroying the Source of the Bankai doesn't stop it since it'll just regenerate
If that's the case, then perhaps it would be better to destroy that enormous black orb. A sharp and a narrow flash of a Cero was shot vertically upwards- The sphere that was split into two immediately reformed itself as the chains pulled the two broken hemispheres back into their former shape.
Durability negation maybe
In the next moment, Hisagi let go of the blades he had held in his hands; the dual blades faded away as if seeping into the ground in the form of a shadow. Hikone was not sure what had happened, but when he noticed it, he felt like he had been standing right on top of the shadow. A new chain was entangled around Hikone's arm, biting into the skin with tremendous force. The surface of each chain-ring became a fine blade and slashes through Hikone's arm. It was far different from Kenpachi's sword slash, but nevertheless, it relentlessly cuts the same part incessantly like a chain-saw, burning off Hikone's arm in an instant.
If you try and leave the area the chains will pull you back inside
The chains wrapped around his neck could not be broken no matter what he tried. If he tried to leave this place, to try to go beyond a certain distance away from Hisagi, new chains were further coiled around his neck in layers and forcibly pulled him back underneath the 'black sun'.
Makes the opponent immortal as well
But then, Hikone noticed something. The fact that the chopped-off arm had already returned to its original state.
At first, Hikone thought that he was hallucinating, but the momentary pain felt too real to be an illusion. It was then that Hikone realized.
Hisagi was not the only one. Hikone, too, had become just like Hisagi. His body had become indestructible.
"No way..."
What Kazeshini truly does
It was another form of fear that reversed the fear he had held on to for so long.
If the Shikai of Kazeshini involves reaping and circulating the flow of lives in the world, then the Bankai involves a chain of seals that halts the flow of life and stagnates the world. It locks everything, forbids death, forbids life; the 'black sun' binds even the reishi flowing in the atmosphere.
Therefore, Kazeshini traps the world within a chained prison where no circulation takes place; neither regression nor evolution. Ironically, this scenario that forces the stagnation of life, is the exact same world in which there exists no boundary between life and death.
This resembled the very form of the world that existed before the birth of the Soul Society.
There is no time limit as long both individual have energy, if one persons energy is completely expended both individuals die.
hen... both me and you, Hisagi-san, will never die...? What does that mean, Hisagi-san?"
"Of course, it's not for eternity. If you continue to slash at me, I will die someday."
To Hisagi, who spoke these words in a light and easy tone of voice, Hikone replied, tilting his head,
"....Why do you teach me something like that? Then, I have to keep on attacking you until you die?"
Although he still did not understand the meaning behind Hisagi's words and what he was attempting to teach Hikone to overcome, Hikone posed this query.
-The answer was quite simple.
"Yes, thereupon, I will die. But so will you."
The Bankai is fueled by the energy of both individuals
His reiatsu was building up through the chains and accumulating in the 'black sun' overhead. Presumably, a large amount of reiatsu was stored in the sphere made out of chains, and this reiatsu was being used to restore the injured person to their original state.
The reiatsu of all those who share lives via the chain and are connected to the 'black sun' is averaged.
In other words, as long as Hikone continues to cut down Hisagi, Hisagi's wounds would be healed by the consumption of reiatsu of both Hikone and Hisagi. Vice-versa; the same thing would happen if it was Hisagi who tried to cut down Hikone instead.
