A Not So Evil God In Fate/Grand Order

'What is this foul magic?' Medea thought, momentarily stopping her rain of light on their enemies. They weren't strong, only having their numbers to give them trouble, so she could take some time to be distracted.

Just some seconds ago, she noticed a strange shift in the atmosphere. Like something bizarre even for her standards was manifesting in the world. The strange thing was that it came from her Master's direction, but that didn't make sense. Seth wasn't known to possess magic, and the Leviathan wasn't a creature capable of wielding something of this caliber, despite its name of Apocalypse Beast. 'A third party? If that were the case, then this does not bode well for us.'

Caster shook her head. It wasn't her problem. What she had to do was to keep the assault. Besides, her Master seemed to be like an undying c.o.c.kroach, so she didn't have too many worries about his fate.

In another place, far away from the Okeanos' Singularity, a white-haired man sitting on a throne shifted his gaze to somewhere unknown. A frown soon marred his face, seemingly displeased by what he was witnessing.

"Humph. A fool's attempt to replicate what cannot be understood. Without a doubt, you are the cancer that made its way into our colony. Let us see if you still hold the same convictions once we meet, what ideal will ultimately triumph in the end. If mine... or yours." His voice was full of scorn, but hidden deep within it, there was also some form of competitiveness.

Having said that, the man simply closed his eyes, opting to focus on something worthier of his time.

Meanwhile, back in Okeanos, Seth was facing the still enraged Leviathan. However, now there was something different around him. Numerous purple Demon God Pillars danced violently around him as if trying to show their resentment for the world that created them.

"Ars Goetia of the Lesser Key. Summoning of the sixty-fourth pillar. Demon God Flauros. Henceforth, I am your Master. As the rightful Ruler of what is beyond the Created World, and the original one, your will is now mine to control." This was the first time Seth gave a try to magic, and honestly, he had expected to start with something more pleasant than weird-looking tentacles, but since Lev was the only thing he — technically the Skeleton — had eaten, it was the only option. Still, that didn't mean he was happy about it, quite the contrary. Being a demonized character, using demons wasn't exactly something to celebrate about. This was something that Seth and his counterpart, both being the representation of two different demons, could wholeheartedly agree.

(A/N: Beyond the created world refers to the land where demons lived/originated in Ancient Egypt)

It has truly been a long time since he had obtained an ability that way. Last time, it was by ripping and eating one of his sister's wings so one could guess the thousand years difference.

'But then again, there is no better way to show my resolve. Besides, I bet I can annoy the one responsible for these Singularities with this, so that's a plus.' While it was not the "real" Flauros, being nothing more than a puppet—a mere imitation, it didn't pale compared to the original. And in the red-haired man's opinion, it was better. Same power, but you didn't have to listen to all of Lev's trash talk. A win-win in his book.

His thoughts aside, now it was time to focus on his opponent. The sea monster had been eyeing every tentacle warily, despite its state of rage. Those things were literally everywhere, allowing almost no room for maneuver and get to Seth. Even so, it wasn't like it was going to let itself be intimidated by a bunch of squid's extremities, and as one of the proud rulers of this ocean, that could not happen.

Not caring in the slightest, Seth extended his hand toward his enemy and commanded the pillars to give the blue-scaled beast a good beating. The idea was still subduing it, so he would have to conform with only using his summons for a physical approach instead of using their full, magical-oriented capabilities.

Immediately, every Demon God Pillar shrieked and sprung to action. Although they couldn't move from their position, they could still use their incredible length to reach the beast in front of them.

The Leviathan didn't lag behind though. Like the mad beast it was, it swam at the incoming foes with the strength of a berserker. Opening its mouth, it began to easily tear apart the pillars like they weren't even there. It kept advancing, biting some, and ignoring others.

It didn't take much for the blue-scaled beast to reach close enough to attack Seth. Again, it absorbed the oceanic water into its mouth, though this time the quantity was much greater than before. Even so, the red-haired man didn't show any signs of trying to dodge. And that was because there was no need to.

"If you take one down, another one will come to take its place." When the Leviathan was about to fire, all of a sudden, a Demon God Pillar appeared on its side and wrapped around its neck with a tight hold. Not even a second after, another one did the same but around its mouth, forcefully closing it just in time for its attack to go off inside of it. Not content with that, Seth ordered every Pillar at his disposal to restrain the Leviathan.

As per his command, one by one, they started enveloping it, making sure the giant monster wouldn't be able to escape, or even move for the matter. Their weird cries of joy only worked to make the situation more bizarre.

The Leviathan offered no resistance — not that it could — and in no time, only a small part of his body was visible, mainly his eyes and mouth, which were currently bleeding for its failed attack earlier.

Once Seth was sure that it was well subdued, and that it wouldn't pull some crazy stunt, he finally approached it. His ears caught the heavy sound of his foe's breathing. It seemed its mad rampaged had taken a toll on its body, not to mention the internal damage it suffered when he burned its mouth and when he made it eat its own attack.

"So, are you back? Just know that the next temper tantrum won't end in me just restraining you." He was too rusty to try and go for a more subtle approach—one more benefiting of a Hero. That and the following experiences in his life had made it so that his go-to choice tended to be a more violent one.

"..."

He didn't receive an answer even when he waited some seconds, so he took it as the Leviathan being still under a state of mindless rage. It was only when he was about roast it with a thunderbolt that he got a reaction in the form of a low grunt.

"Are you a m.a.s.o.c.h.i.s.t or something? Speak if you don't want to be hurt. There is no need to go all silent when you had been screaming not long ago." Without a need for combat anymore, Seth dispersed the storm clouds above them. Additionally, he commanded the Demon God Pillars to unwrap themselves from the Leviathan.

As he didn't need them anymore either, he also recalled them back to wherever they came from. The moment he did so, the horrible wounds surrounding its body became visible. Its face was a mix between scales, muscles, and bones. It was certainly something not to take joy in seeing. The rest of its body was in similar conditions, although not to the level of the face. Some of its scales seemed to be melting as well. The cause of that was the physical contact with the Pillars as, while Seth didn't command them to use Magic, just touching them would produce that effect due to Flauros' nature of "burning everything."

Although Seth couldn't see the state of its body perfectly, the smell was enough indicative of how bad it was. He didn't know if the Leviathan had healing capabilities—and honestly he didn't care. He was a little tight of time at the moment, so he didn't want to wait and find out. So, without delay, he activated his Noble Phantasm first effect to transfer all the damage he did to it back to him. As the blue-scaled beast was also under his protection...kind of, Seth could still do it.

One thing was for sure though, it did hurt very badly, and that was taking into account the second effect: "While battling a Serpent-type enemy, all damage is reduced in half." This meant that even the damage transferred to him by the first effect was halved. With that in mind, it was very surprising to him that the Leviathan was not going berserk again from the pain.

Their physiology was not the same, so the transfer ended up creating quite the ghastly sight on him. Thankfully, the regeneration had activated, but as he had been overusing it, it was taking its time.

Meanwhile, one by one, the wounds on the monster's body were starting to disappear one by one, surprising even itself. It was only when it fixed its gaze into Seth's figure that it understood. However, the only thing that came from its now healed mouth was a snort of disinterest.

"Whadda—.... What do you plan to do now?" Seth asked the Leviathan, totally ignoring the slip he made due to his still-healing mouth screwing him.

The Leviathan, ignoring it as well, made a series of consecutive roars. Even someone who couldn't understand its language, or understand its emotions like Seth's case, would be able to detect the hate laying in those cries.

"Reevu— Revenge, huh? Fine by me. We will be able to kill two birds with one stone. You worry about Theseus while I massacre Herakles." It was getting increasingly difficult to ignore the laughing voices inside his head at this point.

Roaring one more time, the blue-scaled beast turned its head to a particular direction. Its eyes narrowed dangerously. Seth was aware that its controlled fury was a hundred more times dangerous than its mindless one, so that meant the King of Athens was in for more shit than he was until moments ago.

"...Yes, I agree. As long as you stay close to me, I can prevent any influence he may have on you. Though be warned, my main objective is Herakles and Herakles alone. If you by any chance get separated from me and fall into his clutches again, I will not help you." This time Seth took his time to properly speak. But leaving that aside, he wanted to be clear about his intentions with the Leviathan.

They had formed a spoken pact before. As long as it helped the Chaldeans, he would save it when this Singularity eventually came to an end. While it was true he fell into enemy hands, it was also true that he helped them escape. However, if its actions conflicted with his interests, then he would forget all about it. His personal feelings aside, there was no doubt that Herakles was the main threat to the successful completion of the mission. He just couldn't stop fighting him to go help the Leviathan and then risk Zeus' son harming—or worse, killing Drake or Fujimaru. One was an important pioneer of this era, while the others was the only human Master.

The response of the Leviathan was to give him a sideways glance and a snort, something he interpreted as "You don't have to tell me."

"Perfect then. Now, let's go back. Your subordinates are creating havoc thanks to you. If they harm the ship then I will use you as a transporting horse." If the blue-scaled beast had hands, it would give him the middle finger.

Nevertheless, it was true that there was no time to lose. Revenge awaited, and the sooner it happened, the more happy it would be. Although...

Secretly glancing at Seth, who had taken a comfortable spot on top of its head for some reason, its eyes showed a strange glint of hate, concern, and fear.

'There is no much time left indeed... How long can you keep that thing restrained? I hope I made the right decision, and not the one that will doom me in the end...' The Leviathan thought in worry. Its inner voice had a female tone, finally revealing her gender.

The following days would decide the future of the world, quite literally. The question was, who will be the one responsible for its eventual demise?