Feeling that attacks coming for both Yoruichi and Sona, Kisuke embraced them closer and used his own body to block the attacks. He could have deflected it away but he much rather sped up the opening of the space than retaliate. Kisuke would rather lose a few limbs than lose these women in his embrace.
Nyx and Pluto didn't let up and kept attacking, however, there is some reservation in their attacks, thinking that Kisuke is preparing something big and they are watching his actions closely so they could evade whenever necessary.
Twenty-five seconds has passed, Yoruichi is already unconscious and wheezing, Sona is already pale and black bits are appearing all over her skin once again, while Kisuke already lost his right arm and has deep wounds all over his body. The only relatively intact part of him is his head which he put more effort into protecting than the rest of his body.
'What's up with him? He isn't even fighting back... What is planning?' Suspicious started to settle in the minds of both Nyx and Pluto and started attacking Kisuke with renewed vigor, however, when the thirty seconds mark since disabling the ritual has passed, a split in void suddenly appeared in front of the three, "What!?" Nyx and Pluto simultaneously exclaimed.
Kisuke, while holding the other two, jumped in, "Don't let him escape!!!" Nyx started panicking for the first time. She now knew that if someone of his caliber is able to escape from all of this, then they wouldn't have any good ending. She then sent the largest attack she capable of in a short time frame, a gigantic javelin made out of darkness, intending to kill him before the portal closed.
Since he already opened the space, Kisuke's spells are now available to him again and this time, he activates Millon Escudo (Million Shields). The green pulsating hexagonal barrier appeared behind him and it expands to cover the three of them. The javelin was stopped by the shield and the portal closed.
But before it could close completely, Kisuke looked back to both Nyx and Pluto and his eyes were something that they would never forget in their entire lives, the pure, clean, calm and unabated killing intent, which immediately sent chills to their backs.
The javelin of darkness pierced through the hexagonal barrier but the targets are long gone, "...What sort of monster have we made an enemy out of?" Nyx muttered as she recalled those eyes.
Pluto stayed silent for a few moments before speaking, "...It's alright, Nyx-sama... They couldn't possibly survive the poison. As long as it entered its victim's body, it'll only get stronger the more time has passed." Instead of comforting Nyx, Pluto is saying this to comfort himself.
"Report everything that happened here to Hades... And send some people to repair the ritual site. I'll be supervising them. We can't have it not functioning for a long time." Nyx chooses to forget about Kisuke after hearing Pluto's words as she truly believes how terrifying that poison is.
"Understood." Since the restriction in space is already broken, Pluto directly teleported to their headquarters to report everything to Hades.
After he disappeared, Nyx was left alone in this deadly quiet dome and sighed. She held her chest which is still beating quite fast, 'Will it really be fine? I shouldn't have accepted this work...' With her regrets and worries, she teleported away to rest.
.
.
.
Kisuke, along with the unconscious Yoruichi and Sona arrived at the training ground near his laboratory. Medusa, who's waiting diligently, instantly felt their presence and came in running. But before she could approach them, Kisuke shouted at her, "Stay away!"
Medusa saw everyone's state, especially Sona's and Kisuke's missing limbs. She wanted to approach them but she followed Kisuke's command and used her fastest speed to gain distance from them. She doesn't know what happened, but the desperation in his voice is enough for her to follow whatever he says. Medusa moved away until she reached the edge of the training ground and a second later, she saw a very strong barrier suddenly activating around his laboratory.
A few seconds more, she felt another barrier activating outside the training ground, isolating it from the Dimensional Barrier, effectively cutting off anything that can come through it.
Although very much worried, she knew that all she could is to wait for her master's further instructions or when he takes down these barriers.
Inside the first barrier, Kisuke set both Yoruichi and Sona on different operating tables and took off all their article of clothing, leaving them stark naked. However, Kisuke isn't in the mood to appreciate this scene and used his only remaining arm to start treating both of them. He doesn't have enough energy or time to regenerate his wounds or missing limb so he could only make do on what he has right now.
Three days has passed and Kisuke was able to stabilize Yoruichi's condition. Although she's already on the relatively safe side, Kisuke couldn't completely remove the poison from her, and her body could deteriorate at any time, so he still has to watch her closely.
Kisuke tried to use Orihime's ability of 'Rejection', the poison has some weird properties that make the ever so powerful 'Causality Manipulation Ability' almost rendered useless. Although it could be also blamed for Kisuke's inability to utilize such a technique properly.
His biggest problem right now, however, is Sona. Since she has a weaker body than both Kisuke and Yoruichi, her life is always hanging on the brink of death even with Kisuke's help. But now that Kisuke could focus on her, and the fact that he already analyzes a bit of the poison, he could strengthen Sona's treatment.
Another ten days has passed, Kisuke gently smiled at both the unconscious girls as there is no trace of the poison left and Sona's limbs are back. The only downside is they should be a lot weaker than they used to be, but they can gain it back with a bit more treatment and training.
Kisuke then finally focused on his own injuries and poison. Pushing his condition aside for the two girls made more injuries for him but he doesn't regret it even for a single bit. Before he starts on himself however, he checked the barrier if it's still properly working or there is something that hit it. The first barrier he set around his laboratory is to stop the spread of the poison and the second one is to prevent pursuers that might come after them.
Although nothing is amiss with the barrier, it's strangely quiet and it's giving Kisuke some weird feeling. But he couldn't focus on it now as he needed to stay alive first.
Another three days after treating Yoruichi and Sona, Kisuke was able to restore his basic abilities and heal his wounds, including the missing arm.
Kisuke diagnosed his condition and figured that his overall abilities were reduced by 50%. He clenched his fist and swore that he would take his revenge, not for himself, but for hurting his women.
Kisuke took down both of the barriers and he saw Medusa excitedly running to him.