A/N: here is the next chapter you all been waiting for hope you all enjoy.
______________________________________________________________________________(Previously)

Y/N: I knew you would say that so o have no choice but to agree.

Y/M said as this made Artoria happy as she hug him and Y/N hug her back.

Y/N: now let's get ourselves ready we still have a few more minutes before it begins.

Y/N said as Artoria nodded at this as the two went to grab his students and daughter.

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(Continuation)

As they all prepare themselves to attack on the city where Rianna and her forces are.

We could see Y/N and the others all ready themselves.

There plan will work as Rianna won't just sit to the side.

While her whole city is being constantly bombarded.

She will surely take action to it anv when falls under there trap.

They will make sure she won't return back to the castle and stop Y/N.

But even if she mannage to arrive at the castle it would already be to late for her.

As Y/N should have now been able to take the black stone power.

When that happens Rianna power will gradually decrease to immense level.

And it would also mark the end of the war when they mannage to capture Rianna.

Right now though we could see Y/N is right now standing on the field as he looks at the artillery infront of him.

All of which are the size of Gustav Railgun like the ones that Nazi Germany has created.

But this has more than 6 Barrel each of which can fire 60 rounds per minute.

It would be enough to destroy the city alone.

However due to the size of this city  it would take several more of it to destroy it.

With only a small percent if there power as they cannot risk of getting the underground falling apart.

Y/N: are all the artillery ready to fire?

Y/N asked as he turn around and look at Walter who so standing 15 meters away from him.

Walter: yes all of them are ready Y/N we await your orders.

Walter said as Y/N nodded at this as he put on his helmet.

Ashe then radio a message to all forces around him and to those that are fighting in the West.

Y/N: to all who hear this I am leaving a message to all that we are in are final moment of this war before it ends many have you suffer from this war but this all did not stop as we will finally end this war once and for all.

Y/N finnish speaking bit did not know what the huge impact it has made to all of the troops.

As this boost there morale greatly than ever before.

As they were all determine to end the war once and for all.

Y/N: Rose wait for my order and fire the shot when i give you the signal.

Y/N said as he transmitted it to Rose who nodded at this.

As she was in a tower that is only a few meters away from him.

As Rose have him a salute at this as she holds onto her transmitter.

Y/N: well here goes.

Y/N said as he then relax ad inhaled for a few seconds and then spoke.

Y/N: open fire!

Y/N said as Rose immediately gave the signal and the sound of cannons firing could be heard.

Meanwhile in Rianna castle we could see her having a frustrated look on her face.

As she looks at the magic map on her table and see more than all of the coast in the West have been taken by the enemy.

And they are making a huge progress as they march towards the capital.

They are more the 503,638 miles away from the capital.

And by the speed they are vang it would not take more than an week before they arrive here.

And it is also the reason why she has heavily fortified the city.

As the more she uses the black stone the lesser control she as on the stone.

As it has been acting strangely for the pas 2 days now ever since the Celestial Empire and Coalition Forces have invaded them.

As she cannot enter the Divine Realm so she had to use another method instead.

And it was for her to awake the Demonic Beast that has been sealed within the underworld for years now.

It has the power that could make her easily trample the Celestial Empire.

But little did she know that even the Demonic Beast cannot defeat the Celestial Empire.

Rianna sigh I frustration at this as she cannot reveal that Beast.

Not until they have attack the city is when she will unleash the Beast from its chains.

Just then the door to her throne room open and came in her most trusted general Likron.

Likron: my empress we have not received any news back at the city if Zalos.

Likron said as this made Rianna have a confuse look on her face.

But quickly return back to her cold and neutral look on her face.

Rianna: it may just be he is lazing around ignore it we have much better thing to do than him.

Rianna said as Likron nodded at this as he then turn to look at the map.

As he gave out a sigh when he saw tha the enemy has already mannage to gain a massive hold on 35% of the Empire.

Likron: are forces cannot hold long much longer my Empress within a week they could reach the capital.

Likron said as Rianna ignore this as she is well aware of that fact by now.

Rianna: I am aware of that general likron however we can just let them come as I have a way to deal with them

Rianna said as she had a cold and sinister smile on her face when she finnish saying it.

As this made Likron raise his eyebrow as this but alto was interested on what Rianna will do.

But to his perspective he is seeing Morgana.

As Rianna is the one that is controling the body of Morgana.

The real one is prison on a mirror lock in the most deepest dungeon of the city.

Along with the Black Stone and some fake one to make sure they will not easily find the real one.

Likron: oh and what is that you plan to deal with them my Empress?

Likron asked with a curious look on his face.

Rianna: that is something you have no concern off for now you go and prepare the rest of the remaining army we have.

Rianna said as Likron nodded at this and immediately he was about to leave when suddenly.

*Boom*

The sound of massive cannons firing from afar could be heard.

As this startled the two and immediately thought that the city if Zalos is under attack.

Rianna: I never new they would have attack Zalos this fast it seem I have underestimated them.

Rianna said as a sinister smirk could be seen in her face.

Likron: I don't think so my Empress it didn't came from Zalos.

Likron said as this made Rianna having an even more ugly expression on he face.

As shv thought that the west have been broken through by the enemy.

And is now attacking them she wasn't expecting this to happens so fast.

Only a a day or two since they attack her Empire.

And yet they already mannage to make it her well she isn't just going to sit and watch the battle.

The moment she was about to stand up a massive boom.

That caused the castle to shake and have of it falling apart.

As the throne room was sent falling to the ground.

Likron was unfortunately not able to survive as he was crush by a pillar.

However Rianna had survive from the colapse of her castle.

As she looks around and see the city starting burn in blaze.

As this made er scream In rage when she saw this

Rianna: they dare to destroy my castle I'll make them all pay.

Rianna said as she focus her magic and immediately conjure a barrier.

But even then the barrier could not hold on and looks like is slowly making holes on the barrier.

Surrounding the city as dozens of explosion could be the continue to blow the city into pieces.

Rianna was furious at this as she search where the attack is coming from.

And see it 2000 miles west from the as she then commanded her 556 billion armu to charge to West.

As they all obeyed and immediately left the city as 5 billion demons were guarding the underground.

So there is nothing for Rianna to worry about since no one will be able to enter it.

As she then teleported out of the city and immediately had her back sprout out black wings.

As she flaps it and immediately flew to where Y/N and the others are.

With her whole army following her from behind.

Meanwhile back at Y/N we could see AL of them 1 km away from the artillery that are continuously firing.

Artoria who was on top of command tower behind the artilleries.

Along with the others with her as they look at a holo-map.

Artoria: looks like we got her attention.

Artoria said as the others all nodded thos as they all look at the incoming horde of army.

Walter: that massive magical signature leading them must be Rianna.

Walter said as he then turns around and look at Y/N.

Walter: looks like your plan did work Y/N.

Walter said as Y/N smile at this and immediately turn to look at the map infront of them.

Y/N: she is now focusing her attention on us so everyone gear up.

Y/N said as the others all nodded at this and immediately they all went go here position.

Y/N and Artoria along with the four students if his immidietly stood on the command tower.

Artoria: we should go now there is only a small number of demons in the underground.

Artoria said as Y/N nodded at this as he turns around and pull his sword from its sheath.

As he slice the air infront if him and immediately a portal gate open.

Y/N: yes and let go we only have a few hours or so before Rianna will be aware of us trying to take the black Stone.

Y/N said as Artoria and the 4 others all nodded at this as they all jump into the portal.

Meanwhile as they left we could see Rianna flying at an insane speed.

As she was now near the green forest infront of her that shock  her.

As she never knew that there was till part of her land that is still flourishing.

Rianna: so they are here then.

Rianna said as a murderous aura surrounded her as she look to see where the explosion is.

As she saw the giant cannons al firing to the city.

Rianna was about to head towards the artilleries when whe suddenly got hit by someone.

Merlin: you are not getting any near those cannons Rianna.

Merlin said as she appeared and was standing ontop of a tree.

Rianna had a shock look on her face when she saw Merlin.

Rianna: so you already know you disgusting half-breed.

Rianna said with anger in her eyes as she looks at Merlin.

Merlin: of course if it wasn't for the Celestial Empire spies finding the truth we wouldn't have know that you were the one who cause all of this not Morgana.

Merlin said as she am her new staff towards Rianna.

Her staff is made of a very powerful material from the Celestial Empire.

And thanks to Y/N help for the last few days before they attack the Moragan Empire.

He has taught her various spell that is very powerful.

Along with Da Vinci and Gilles of course as the three of them rival each other in terms of magic.

Rianna: doesn't matter I'll destroy you anyway.

Rianna said as she points her finger towards Merlin and immediately black lighting came flying straight go Merlin.

But before it could even hit her a portal appeared several meters away from Merlin.

And immediately the black lighting was absorbed by it before disappearing.

Rianna was shock at this when she saw her attack didn't work.

Da Vinci: she is not the only one your going to fight Rianna.

Da Vinci said as she and Gilles appeared right beside Merlin.

As the three of them combine could easily beat Rianna and hold her off.

Since she holds a small power of the black Stone she can possibly escape them.

As they will due there best to distract her until Rianna connection to the black stone is gone.

Walter and the others soon arrive along with several of there army.

As Rianna demonic forces arrive also as the two opposing side look at each and then.

Walter:everyone attack!!!

Walter said as he unsheathed his sword along with Lancelot as they all charge at Rianna and her army.

Rianna: destroy them all

Rianna said as her army then charge towards Walter and the others.

As the will try to distract Rianna as long as they can.

To Be Continued.
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A/N: that is all for todays chapter hope you all enjoy I'll see you all next time Author Out.