"What!? What the hell did you do!?" Kokabiel was askance. He didn't expect that the evil spirits he is most proud of would easily be killed. Even the Devil Kings and Biblical God of the past had a hard time killing his 'immortal' army. Even after the war, Azazel is apprehensive against this power of his that he has to seal it.
So when Kisuke just casually killed them with a single sword wave, a bit of the fear he had felt earlier started to return, 'No! I just have to overwhelm him with numbers!' Kisuke stepped on the air and slowly walked towards Kokabiel. Every three seconds, he would fire the sword arc and it'll remove a hundred or so zombies from their ranks.
Setting aside his question, Kokabiel gritted his teeth and flew higher up and sent thousands of zombies in his position. But Kisuke only used Flash Step to get away from the crowd and restarted his killing spree. Despite their overwhelming number, they couldn't catch him.
Kokabiel still has some hidden moves but it requires sacrificing a large amount of these zombies so he didn't want to use it yet. Thinking of other ways to subdue Kisuke, Kokabiel caught sight of the Devils he's playing with earlier and sent a horde of zombies to where they're standing.
Sona, Rias and the rest were startled when they saw the horde of zombies coming to them and started casting their magic once more while Xenovia and Yuuto came forward to serve as the vanguard. Issei is still pinned down on the ground by Yoruichi and used her Kidou to seal his mouth so the only thing he can do is squirm about.
Sona, Rias, and Akeno bombarded the first of the zombies with their magic and managed to blast them away. They immediately celebrated because fighting them isn't that hard and they only need to pace themselves with the usage of the power and wait for reinforcements. To their dismay, however, the zombies immediately returned to their original form and restarted their advance, "What!?" Rias exclaimed. The only difference is that Rias' Power of Destruction managed to slow their regeneration, albeit, only slightly.
They resumed their bombardment of magic but the result is still the same. The horde reached the vanguard so Xenovia and Yuuto started bisecting them but they only regenerated the same even with their Holy Sword and Holy-Demonic Swords. The horde kept getting larger that they are going to be overwhelmed in a few seconds when Yoruichi spoke, "Get back here."
Without hesitation, Rias and Sona commanded the others, "Everyone, regroup!"
Once they gathered around Yoruichi, the black cat started to glow in blue light as she muttered, "Kyoumon(Mirror Gate)"
A barrier in the shape of a cube surrounded them and its surface is akin to the surface of the water. The Devils and exorcist were doubtful if such a thin barrier could stop the advance of the zombie horde and readied themselves again to intercept them once the barrier broke.
The zombies reached the barrier and the first one brandished its fist against the barrier but what happened next is out of expectation, including to Kokabiel, who commanded them. The arm of the zombie it used to attack the barrier burst open and it didn't regenerate. However, the zombie doesn't have the capacity to think and didn't stop its assault until it disappeared... forever. The same thing happened to the other zombies and only after the hundredth zombie died, Kokabiel recalled them seeing that they hadn't done anything to damage the barrier, 'Dammit! What's happening!? What's up with that cat!?'
"Don't get too distracted." Kokabiel heard Kisuke's voice and he suddenly felt a pain in his left arm When he looked at it, from the elbow and below is already missing and saw that his arm is already flying upwards, "AHHH!!!"
Even during the Great War, Kokabiel never had this kind of injury as he always fights from the back, so this sudden pain blocked his thoughts for a moment before an unprecedented rage surface from deep inside him and his own voice resounding in his head saying, 'KILL! KILL! KILL!' All of his thoughts of escape suddenly disappeared and was replaced with destruction.
'Hmmm? Strange... Something doesn't feel right... What is it?' Kisuke temporarily halted his assault and inspected Kokabiel's state but couldn't tell what's bothering him.
After his scream of pain, the sudden change in his mindset made him started laughing like a maniac, "AHAHAHA! GATHER!!!"
Raising his only arm, the 50,000 zombies gathered above him and their flesh started fusing to form a monstrous spear of flesh with black halos surrounding it.
Kisuke and Yoruichi furrowed their brows at this sight. The Devils and exorcist are also disgusted and their stomach rolled. Asia, who is very fragile, directly loses her consciousness.
Vali and Cleria were also shocked at what is happening but they didn't have much to worry since they were able to finish evacuating everyone and decided to increase the radius of their barrier. Azazel, on the other hand, started cursing at Kokabiel and he also started to regret the fact that he didn't let Vali take care of Kokabiel earlier that the situation had gone to the point of uncontrollable, "Vali! Assist that guy!"
Kokabiel threw his spear of rotten and mangled flesh consisting of 50,000 corpses at Kisuke. Vali was about to fly over to block and try to 'Divide' it when he felt the aura around Kisuke shooting up again, 'He can still power up? Interesting... Let's watch first.'
""Kisuke!!!"" "Uraharaha!!!" Sona and this time, with Akeno and Aika shouted at him. They can tell that this attack is very different from the other ones and don't know if he can take it, "Yoruichi! Please help Kisuke now!" Aika even started pleading Yoruichi who only watch the spear approach her lover.
"You lot are still underestimating him... And besides, if those things has a nemesis, it is us. It's that Fallen Angel's bad luck that they met us. Look~." Yoruichi replied and pointed at Kisuke.
Raising his free arm, he pointed his palm towards the incoming spear and spoke, "Hadou 88: Flying Dragon-Striking Heaven-Shaking Thunder Cannon (Hiryu Gekizoku Shinten Raiho)" From his palm, a beam of blue energy 5 meters across emerged and met the spear head-on.
The gigantic ray is very small compared to the spear of flesh but it managed to pierce it the moment of contact and it went through the whole thing within just a few seconds. Normally speaking, such a puny attack couldn't have done that much damage to the spear to destroy it, but after a few seconds that the spear was pierced, it imploded and exploded in sequence.
The explosion was so strong that every building within the barrier was destroyed and flattened. The two people who are maintaining the barrier felt the shock and increased the power they are inputting on the barrier but they can still some cracks appearing all over.
Kokabiel's remaining zombies and himself were blown away but are still fine. Kisuke didn't move from his spot and just let the wind hit him making his attire flap around in the air.
Yoruichi's barrier also has some minute cracks on it but still overall fine. Sona and the rest were only looking blankly on the scene, but two of them, namely Rias and Akeno is thinking of an entirely different thing as the beam of light reminded them of what happened not long ago, 'That's...'
The shockwave subsided after a few minutes with the barrier around them taking care of most of its force. The battlefield now became a desolated piece of flat land. Everything went silent.
The first one to make a noise is Kokabiel, but instead of disappointment, his maniacal laughter continued and spoke his command again, "GATHER!!!"
This time, instead of a spear, the remaining 200,000 thousand or so zombies started fusing with him instead.