For the next few days, Issei had experimented and discovery new things about creating sacred gears. One is that it need a huge amount of concentration in order to create based where ability of sacred gear can be places.
If the condition is not meant it would only create an artificial sacred gear that cause too much stamina. It is rare due Issei [Hope] but the chances is one out of a thousand success rate. The gap seem far but Issei was able to make weaker sacred gear that is far superior than artificial sacred gear.
He called it pseudo sacred gear. One of his creation was a simple sacred gear that is in form of a third crystalize eyes that able to ignore defense as long they see the opponent. It completely bypass any barrier even that had [infinite] boost.
Though it was still weaker that cause the user's eyes to go blind even if they had regenerative ability when overuse. This why Issei still upgrade it and plan to give it to Koneko in order to beat her opponent whatever the distances. He wanted the sacred gear to work even without seeing the enemy.
Another sacred gear was four centipede tail attach behind the waist that grew when summon. It isn't much but it can extend infinitely and powerful enough to take a hit from Irene.
Azazel told him that he receive report about the seraph having hard time finding the anomaly which was Issei. He remained silent since it was funny seeing the angel getting a headache due to his student. Their weren't any harm to it anyway beside the sacred gear system becoming more active.
Issei showed his lover the sacred gears he had made surprising them of his ability to create them. He also discovered that he can upgrade his lovers sacred gear into much stronger ones. It allowed him to add changes and unlock potentials on a sacred gears.
Yuumi for example had her Sword birth and blade blacksmith create armor reaching her forearm that increase her power while decreased the Drawback. She can also summon swords behind her and covered whole landscape with blades calling it the 'Unlimited blade works'.
However, it still drawbacks but it still minimal that she would be able to remove it by training. As for the other sacred gear users, Ingvild and Gasper is much harder to be upgrade as their aren't physical form for Issei to work with therefore couldn't upgrade them.
Though he didn't need to do anything as Gasper had a similar visitor as Valerie that turn her into a pure blooded abyssal vampire that allowed to better use her shadow form. Essentially upgrade form of her ex side balance breaker that make her encompassed a small region.
Issei felt conflicted from the help his receive from someone he hadn't met. Never the less, he was grateful for the help.
Murayama's sacred gear was upgrade in order for to better control and reduce the drawbacks which allow her to move faster than light speed. Issei also create temporary sacred gear for Aika and Katase.
Aika was staff that act as scythe increasing her dark and curse magic while Katase wielded black katana and kodaichi that had the ability to place powerful poison if cut stronger than Samael poison and doesn't affect the user.
Meanwhile, Vali didn't want his help saying she prefer to train herself than rely on him. Issei respected her decision and let her do as she wish. Afterward, he discovered the sub dimension of the sacred gear system can be manipulate and turn it into his own personal workshop. The places doesn't allow him to do anything beside the ability to used other sacred gear if he wish.
Though, Issei doubts he would use them when using his magic and boosted gear be much preferred. Never the less, if his opponent rely on sacred gear then he disable their power.
He once summoned the administrator in the real world and they were able to assists him all aspects making it easier to create them. Issei still now learning how to handle sacred gear that has no physical form.
They're physical body exudes power in the spectrum of low primordial god class which is huge asset when he decided to fight alone. The admisnistrator cannot be killed easily as if defeated their stored data would recreate inside the sub dimension.
The only way to truly destroy them is [Nihility] or destroy the sub dimension which can't be easily access due to Big G placing power seals on them.
They were great companion and even straight up told Issei that that the two woman are engage to him due to what their father task them. He was reluctant but time would tell as they bond.
As for his other power, Issei able to reach light speed just using holy lightning mode and make miniature sun by the holy flame of Uriel that could decimate anything. Issei been trying make them into sacred gear with one being an giant axe that when wielded and depending on time of the day cause the user to grow physically stronger.
It was still experimental sacred gear but the potential of that power could be useful. Issei finally able to gain one devil pillar power and it was the Phenex immortality but instead of golden flames its black miasmic red flame.
The speed of his regeneration is almost instant for weaker opponent but for Super class they would be able to see him take time. He once asked Vali to slice his body and did it without hesitation. Issei was able to regenerate to movement she slice his body and even with Divine Divider it still had an absurd speed.
Moving to his other power, Issei able to main his [Crimson Satanael] form and with his new weapon which he named [Ayin] which meant [Nothingness] was fitting name. With the two Issei could virtually decimate three Dark apostle if he went all out. His last opponent was in the weaker side of the spectrum.
As for his training in mating two forms of energy had progressing but it was slowly and couldn't be maintain for than a second. He still time to train but focus more in things his much capable of.
Sirzechs reported to him about Kuroka investigation and was able to clear her name while also arresting people involved in Khaos Bridgade. Ophis had long left the group which cause it to collapse due the dragon god disappear. However their plan would still be continued. Issei been trying to find where they were for Ingvild since she want to save her aunt hadn't been able to find them.
Issei reassure that his aunt would be saved once he found her. He worried that a dark apostle might have gotten contact with them and manipulate everyone. The place and time they would attack is the peace treaty and Issei already made it a trap due to deciding to restore Sirzechs and Grayfia memory who was shocked recalling everything.
Serafall also had her memory restored and immediately demanded for a threesome with Sona which he happy oblige and the latter decline. In the end, they did it causing Sona to pout and Serafall perverted smile. Issei didn't restore Michael because Azazel told him not to.
He made this decision due to having more control in his power and could easily manipulate the truth form the scene. After informing the other factions, Odin decided to spy on Loki activities and was able to capture him. He's one who had believe in his instinct and trusted Sirzechs.
"Oh Issei you have a visitors."
Issei mom called for Issei who had just finish showering drying his long fading brown hair that would soon to be white. He teleported to the door and immediately saw two mature woman and one petite girl.
One had long silver hair wearing Valkyrie armor while the other is light blonde wearing golden kimono then the petite girl wearing priestess similar to Akeno.
They were stunned seeing Issei half naked body that showed his welled define muscles. Issei teasingly smiled then said.
"Like what you see?"
They didn't even hesitated jumping to embrace him. Each one of them had tears fall on their faces as they muttered his name. He smiled knowing their memory was restored by Irene.
"I miss all of you, Rose, Yasaka, kunou."