You extend your arm forward, every Royal Arm was launched towards Leviathan. When they hit , they created a large explosion that stunned Leviathan. You warped in front of her and hit her with enough force to move her head to the side, and again to the other side. You warped above her and came down and sliced at one of her fins, tearing it off and causing her to cry out in pain.
Meggy: Where did all of this come from!?
Peach: It's when the King or Queen calls upon the powers of their ancestors. Every Lucian is giving him their power, enough power to rival that of the gods. But it's a very draining form.
Desti: Which means that if he doesn't beat Leviathan now, we lose?
Peach: Yes. But there is something else that I'm confused about.
Saiko: What is it?
Tari: She said that he is calling on his ancestors, but didn't the Lucian line end with Noctis?
Peach: She's right. So maybe this isn't the Lucian's doing, but Bahamut's?
Back with you, you were sending attack after attack at Leviathan. Getting up close to unleash a barrage of attacks with all your weapons, or hanging back and using them as homing missiles to attack Leviathan, and block the small water Leviathans. She went underwater and after a few moments, resurfaced behind you. You rapidly warp backwards before warping right up next to her and attack one of her horns, ripping that off as well.
She roared in pain, then began to spin around. Small waterspouts formed around you. She was trying to delay your attacks and try to give off some of her own by going through them by surprise. Each attack you either dodged, or hit her with enough force to steer her off course.
As the fighting went on, the girls heard loud engines and turned to see ships had made their way through the large Waterspout cage.
Peach: It can't be. Those are Imperial ships.
Meggy: Then that must mean that Eggman is there!
Bowser: Where's Eggman?
The girls turn again to see that the rest of their friends had caught up.
Luigi: The better question is, WHAT'S GOING ON?!
Bob: You mean other than the fact that Y/n is currently beating the shit out of a giant serpent?
The guys look up and see you tear off yet another fin. The ships started to fire at you and Leviathan, but you merely turned your weapons and fired them one by one at the ships. Upon contact, they each exploded, causing debris and Magitek Units to fly everywhere. You look back at Leviathan, who looked like she had enough. You fire one more blast like you did before, then grab the Spear of The Oracle, throwing it and piercing her underbelly. You cut all the way down and after you stopped, her body split open, causing a large flow of water to exit her body.
She collapsed on the water's surface and looked at you as you floated there.
Leviathan: Very well. It seems I have underestimated you. My blessing, and my power is yours to command.
In a flash of light, she disappeared. More power coursed through you. Gently floating down, you land in front of everyone as you deactivated the form you were in. Before you could go and celebrate your victory, a familiar voice spoke.
Ardyn: Ah... An impressive display your highness. Really, I must say, I am surprised at the amount of power you posses.
Y/n: You... Ardyn. Who are you? Really?
Ardyn: Why, I already told you. I am Ardyn Izunia.
Peach: No. That's impossible. You died a hundred years ago!
Ardyn: Presumed dead, princess. I'm sure Ramuh showed you that battle over Insomnia?
Y/n: He did. Tell me how you survived all these years, or else!
You summoned the Blade of the Mystic and charge at him. When you attacked, he summoned a sword as well.
And it looked like a red version of your current weapon.
Ardyn: You dare use my own brother's sword against me?
Y/n: What...?
He pushed you back with a blast of dark energy. When you regained your footing, you stared at him.
Ardyn: I suppose I should properly introduce myself as... Ardyn Lucis Caelum. You see my boy, Somnus wasn't the one who was originally granted these powers. It was I, but instead of wanting to fight Ifrit, I wanted to try to make peace with him. After all, if the most powerful of the gods granted his powers to a human, maybe we are worthy enough. Bahamut didn't like that, and so he granted Somnus the same.
He spread his arms out, activating Armiger, only the weapons glass looked red instead of blue.
(I'm sorry, I just REALLY like how this looks.)
Ardyn: Somnus deemed me a traitor and exiled me, killing my wife as soon as she gave birth to my child, and giving them to another family! For generations, Somnus's line prospered as I plotted my revenge. I willingly gave my soul to Ifrit, granting me powers beyond compare, and keeping my human form... mostly.
He looked up, his face went pale, black markings appear on his face. His eyes turned gold as his sclera turned black. it then went back to normal.
Ardyn: Then finally, Somnus's line came to an end with Noctis's sacrifice. But my line continued, all the way down to you, Y/n.
Your eyes widened, you couldn't believe it. No, he had to be lying right?
Y/n: That's not true! There's no way I am your descendant!
Ardyn: Look at the ring your wearing! My brother and I created that ring, not Bahamut! We put the curse on it so only a true blooded Lucian can wear it!
He appeared in front of you, a mocking look in his eyes as he looked down on you.
Ardyn: And I think I would like it back.
He picked you up without effort and slammed you on the ground. He then kicked you over and stomped on the ground, causing a blast of dark energy to launch you upwards, then used the Shield of the Just to send you flying into a wall.
Girls: Y/N!!!!
Before they could run over to you, Ardyn summoned every Royal Arm around the group.
Ardyn: Take one step, and everyone will die.
No one moved as Ardyn walked towards your crumbled body. He grabbed the hand that had the ring on and slid the ring off. He put it on and sighed as power coursed through him. He aimed his hand at you and a green light enveloped you.
Ardyn: I don't want to kill you just yet. I want you at your most powerful, then I will make everyone watch as I rip you apart.
In a cloud of darkness, he vanishes. Bowser picked up your unconscious body and everyone went home, terrified and worried about the coming days.
~~~~~
(Below, I will put the Leviathan boss fight. It's so fucking cool.)
Video and music aren't mine.