Ichibei lost one of his arms, but that didn't actually hurt him aside from expending energy to regenerate it.
Ichibei metamorphosed and produced another set of arms from his back. The three pairs of arms then started doing various gestures and hand signs which produced more barriers that surrounded Kisuke, locking the space itself so that he wouldn't be able to tear it open.
Ichibei couldn't see what was happening inside the barriers he created as it just became multiple black spheres overlapping each other however, he's sure that Kisuke was doing nothing to escape from it since he created a ripple through his barriers whenever he attempted, 'He must be busy devouring that piece of arm. Since it's not directly connected to me, he'll only be able to lengthen his life for a few more minutes.'
Ichibei was also taking a look at what's currently happening in Soul Society and he figured out that they were able to make a successful connection to an unknown realm. As much as he wanted to interfere, there was nothing he could do right now aside from focusing on eliminating the monster, 'He really tied me up here... Is this part of his plans? No. That can't be. He's not the type of person to sacrifice himself for the greater good.'
Of course, he also tried viewing the future, but strangely enough, he couldn't see much and everything in the immediate future was blank. He would have panicked if not for the future he saw where he's standing in front of someone who's not of the Soul race, Shinigami, Fullbringer, Quincy, or Hollow, yet possesses a considerable amount of Spiritual Power in the form of 'Darkness cast by Light'.
Sadly, due to his incomplete existence,he couldn't see any further than that nor exactly know where in point of time that is.
As long as he could see that future, he's certain that he'll rise victorious in this fight.
The next instant, however, his train of thought was derailed when the eyes he had on his back saw the monster opening its mouth and about to bite down on Ichibei's neck once again, "!?"
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A minute earlier, Kisuke was munching on Ichibei's arms in complete darkness without any care in the world.
Tiamat also noticed the change in Kisuke's behavior when he snatched Ichibei's arm, [Have you regained your senses?]
But Kisuke only returned groans that were not even directed at her. Sighing, Tiamat started muttering to herself, [Is this the required minimum amount of intelligence to manipulate Prima Materia? A pretty low bar to pass.]
Prima Materia, a material that Kisuke believed was the source of everything and which Demonic Power, Holy Power, Magic Power, Spiritual Power, Ki, and any other type of energy came from.
It's a material that can't interact with anything in existence until it changes into a subset category which was the previously mentioned energy types.
Kisuke tried studying more about this Prima Materia after hearing about it from Tiamat since this would explain the existence of unique energy types like Ophis' [Infinity] or Flanna's [Dream and Illusion] which everyone thought was an evolution of their Draconic Powers.
Instead of an evolution, Kisuke was thinking that it's actually a devolution of something else and that something else is precisely this Prima Materia that only the Transcendent has a chance of touching.
Tiamat herself explained that she couldn't use Prima Materia in its original form and had to change it into something else before she could manipulate it. And this is where Tiamat's ability as a [Creator] came from. From Prima Materia, she was able to create [Original Elements] which she used as the building block for a world.
It was also from the [Original Elements] that she was able to create the [Sea of Life] which is just a cheap emulation of her sister's, Null's, [Original Idea] which created the souls of Deities.
It was because of these abilities derived from the Prima Materia that the sisters were able to create a world teeming with life out of 'nothing'.
Tiamat was still not sure what changed but it was thanks to the [Original Wind] that Kisuke was able to protect himself from Ichibei's 'hands'. Because of its nature being closer to the Prima Materia, it was hard to detect even though it could be perceived through the basic senses like sight and hearing, [I thought I would have to get out to assist and buy you some time... You have me as a backup, but I wonder if this is also part of your plan?]
What truly surprised Tiamat, however, was the way Kisuke 'healed' himself. Tiamat was already shocked when Kisuke used the [Original Wind] to create a sturdy force field to surround himself, but when he used various elements of the [Original Elements] and sophistically manipulated them to deconstruct and recreate his body, Tiamat thought that she was just seeing things.
Ichibei was correct that Kisuke is not regenerating. He's just kept recreating his body or parts for himself.
Soon enough, Kisuke finished eating Ichibei's arm and was able to get back a portion of what was stolen from him. But when he found a tiny trace of Benihime's trace, it was as if his vigor was renewed and he roared within the darkness, shaking the whole space.
Tiamat wanted to guide Kisuke on how to use the [Original Elements] to break from this seal but didn't really know how to relay her intentions to a simple beast that only wanted to do one thing.
But when Kisuke suddenly disappeared from his spot and reappeared behind Ichibei, Tiamat could only make a blank expression, [Did he just use the remnants of the [Original Wind] that he used to cut this man's arm as an anchor for an Instant Teleportation? Really... Just how is he doing this?]
Tiamat prided herself as someone who's capable of creating worlds from nothing but after seeing Kisuke utilize her own abilities despite being out of his mind, she thought that maybe, it wouldn't hurt to study a bit more.
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Ichibei tried dodging but Kisuke's appearance was too sudden and too close so he was only able to shift his body for a bit. Even then, he was still easily caught and had his neck bitten.
Ichibei hurriedly used 4 of his hands to crush Kisuke's head, however, he was only able to snap his horns which immediately returned to their normal state.
Ichibei also considered slicing off the part he was biting once again but found the weirdly sturdy invisible barrier was now covering him and Kisuke, trapping both of them within this bubble.
He tried tearing apart Kisuke's body but it would just turn into dust before reappearing perfectly intact. At this point, his only other choice was to use a large and powerful technique but that would effectively go off as self-destruction with the situation they are currently in.
Ichibei could also feel tiny bits of his energy being drained so he had to act fast.
And it was then that an idea dawned on him. Eating everything is literally one of his greatest talents. So if there's no way of avoiding him, contest him in the field he wants.
As soon as Ichibei resolved himself, his back suddenly split open, revealing an uneven row of sharp white teeth that were similar to the maggots he commanded.
And just like Kisuke, Ichibei also took a bite and pierced through Kisuke's body.