Vali's team, Rias' Peerage, Baraqiel, Irina, Rossweisse, and Tannin went to a large desolated place before using the Dragon Gate to summon one of the Dragon Kings and one of Loki's sons, Midgardsormr, the World Serpent.
Midgardsormr is a grey Eastern dragon with an enormous body measuring around 500-600 meters in length, well over five times the length of Great Red's body.
When he was summoned, Issei couldn't help but comment, "H-he's huge... But why is he still sleeping?" The Dragon King's eyes were still closed.
"That's just how he is. He doesn't really care about anything and just continues to sleep until something interesting happens," answered Vali.
"What interesting thing could wake up this giant?" asked Issei.
"Just wait. He'll wake up naturally."
And indeed, after a few minutes, the gigantic Eastern Dragon woke up and opened its eyes and visible confusion emerged from those golden pupils, "Did I wake up in a wrong time when the Red and White aren't fighting?" A very laid-back tone of voice emerged from him.
"No. You didn't sleep that long. I'll give you the details later. Let me ask you a few things before you start dozing off again." Vali started talking to Midgardsormr.
He asked how they could deal with both Loki and Fenrir and as Midgardsormr doesn't really care about them, he readily answered. He told them strategies that could work on Loki and they would need Gleipnir, the magical chains that are said to be impossible to carry, to restrain Fenrir.
Although they got great answers, Midgardsormr kept falling to sleep in the middle of his sentences which earned him the 'Sloth Dragon King' nickname from Issei.
After getting the location of the Gleipnir from Midgardsormr, they finally sent him away and sent Arthur and Le Fay to retrieve the chain. Since it's impossible to carry by hand, it was supposed to be Kuroka's job as she can easily take it into her personal space, but Le Fay had to do it with her magic.
A few hours later, everyone participating in the battle got ready. Rias' Peerage, Vali's team, Baraqiel, Irina, and Rossweisse are the ones who would be fighting. Their trump card against Loki, the copy of Mjolnir, will come later as Odin still needs to retrieve it from Asgard.
Issei asked him why they couldn't borrow his spear, Gungnir and Odin told them that their strength is only enough to wield an inferior copy of the Mjolnir.
Once Loki got out of the magic trap, he was welcomed by everyone, and even if he would want to escape, it'd be impossible unless he defeated some people first.
Of course, even if they were ready, fighting a God isn't easy and it became harder when Fenrir was successfully trapped by the glowing chains as Loki suddenly summoned Fenrir's children, Sköll and Hati in addition to many of Midgardsormr's clones.
While Vali and Issei teamed up against Loki, everyone else was fighting Loki's summons and were being overwhelmed, resulting in the situation getting very dangerous. It was then that some backup came.
Saji, in his Dragon King form, came and restricted Fenrir's sons and started siphoning their powers. Soon after, the rest of Sona's Peerage came to assist in the battle. Even though Sona disappeared, they did their best to get stronger and the one who improved the most was Saji, as he could now transform into Vitra, the Dragon King inside his Sacred Gear, though with some help from Azazel.
Thanks to their arrival, the tides of the battle changed.
Seeing this as a chance, Vali suddenly entered Juggernaut Drive and transferred his attention to Fenrir. With the help of Gleipnir, Vali was able to weaken Fenrir and Arthur used that chance to stab its head with Excalibur Ruler. With its ability to control monsters, it was only a matter of time before Fenrir fell under their total control.
Le Fay immediately transferred Fenrir out, along with Vali. It was then Vali's teammates started retreating as they already achieved their goal.
Although Fenrir was no more, Vali's team also disappeared along with it. However, they are still in the advantage against Loki, as Fenrir was more troublesome than Loki himself.
Combining their strength, Akeno and Baraqiel used their strongest Holy Lightning to deal fatal damage to Hati and Sköll. Yuuto, Xenovia and Irina used that chance to behead them, removing them from the battlefield.
But even though the wolves were already out of the picture, the enraged Loki kept summoning clones of Midgardsormr, and without Vali, Issei wasn't a match against Loki and could only keep up because he kept boosting himself. But even that would soon reach its limits, as even though he has a strong body, it wasn't enough to match a God, especially aGod that is one of the main ones in their respective Mythology.
But before Issei reached his limits, the copy of Mjolnir suddenly arrived, giving everyone hope that everything will end.
Seeing this, Loki became even more enraged and desperate. He never would have thought that his father, Odin, would lend the Mjolnir, even though it's just a copy, to an outsider. Loki used one of his most powerful spells to devastate Issei and he was successful.
Issei's Balance Breaker was undone due to the immense damage he took and in this situation, he wouldn't be able to wield the Mjolnir, and none of his companions were capable of doing it aside from him, not even Baraqiel.
Rias immediately went towards Issei and picked him up while tears were streaming down her face. The Phoenix tears that they received from the Phenex Clan were already consumed after taking on Fenrir and the rest.
However, Loki didn't expect that Issei, despite his fatal injuries, would stand up again. Issei, thanks to the training method that Kisuke gave him, got his mind tempered as a side effect due to its insanity.
Ddraig even laughed out loud after seeing his host stand up against his great adversity despite being on the verge of death himself. Issei's will to fight was so overwhelming that Ddraig couldn't help but feel proud and thought that he got a great host this time.
Rias tried to stop Issei as she knew he couldn't fight anymore. Of course, Issei knew of this too. He can't just fight a God with only an overwhelming will to fight. He knew his strengths and weaknesses.
Issei then decided to use what Kisuke had given him.
"Are you sure? The last time you took it out was an accident and made your Juggernaut Drive even worse." Asked Ddraig.
"Not much of a choice here... And if it's just for a minute or two, I think I can handle it. Can't really keep my trump card that can instantly boost my physical abilities hidden." Issei answered with a small chuckle.
"Kukuku, true. But even with that, I don't think you'll be able to overpower that God even for an instant with that wrecked body of yours. Yes, that could strengthen you, but it still depends on the state of your body. You might have had your chance earlier, but not right now." Ddraig added.
But Issei only continued chuckling at Ddraig's words, "As I said, I know my strengths and weaknesses, and this isn't the only strength that I have."
"...What do you mean?" Ddraig asked as he got a really ominous feeling.
"I'll be using you to the fullest!" Issei then faced Rias. Despite his messy appearance, Issei asked her with a straight and serious face, "Buchou! Please let me fondle your boobs! Directly!"
"...Huh?" Rias was taken aback, and so were the others, including Loki himself.
Ddraig cried out loud in despair, but he couldn't deny this was another one of his strengths. The strength of his will through perversion. Although it was unconventional, it is, without a doubt, effective, as the power given to him by the Boosted Gear became greater after he fondled some boobs.
Using the remains of Medusa's Divine Core controlled by Ophis' snake, the Ki from the surroundings wildly went into Issei's body, boosting his physical abilities beyond what his human body-turned Devil was capable of.
At that point, Issei reached something as the golden light descended onto him. Using Rias' boobs as the medium, he was connected to a being that didn't exist in this plane.
Introducing herself as the Chichigami (Boob Goddess), she claimed that she heard Issei's prayers and devotion and that she decided to give him her blessings, granting Issei additional strength on top of what he currently had.
At the connection of such being, even Ddraig reeled back as he could feel that this Chichigami was countless times more powerful than both him and Albion in their heydays.
Thanks to the Chichigami, Issei became even more confident and was able to wield the copy of Mjolnir with ease and overpowered Loki, successfully sealing him.
Without Loki, the rest of the monsters were just mobs to the Devils, Fallen Angel, Angel and Valkyrie.
Editors:
28th00: Oh no, early Chichigami means early absolute INSANITY that is the ExE world… Considering that the Chichigami is on the same level of existence as beings like the Soul King, Aizen, Ichigo(both final forms), Great Red and Ophis… Well… Transcendent beings are scary reality warpers as a byproduct of just existing.