I reminisce when I'm still a kid when we encounter one lowest rank dragon during high school days when I'm still improving and enhancing my skills in swordsmanship and learning magic. 

It's a disaster back then, we need at least 6 people to kill one stone dragon and we nearly all died.

At that point some saying or metaphor when someone who's cocky and proud of himself and tell his classmates that I'm the strongest in this class. 

Then someone will rebuke him and tell him  "Are you stronger than Dragons"? And everybody will laugh at him and he will get embarrassed. 

Even 1 lowest ranked dragon can annihilate the town that's shows how strong the dragons are. 

I recalled I read some book says that Dragon refers to a whole category of monsters that tend to be covered in scales with a long thick tail, often bat-winged with four or six limbs. Multiple heads are also possible. 

Their intelligence also varies who's  smarter the stronger they are, the smarter ones tend to be able to use more powerful magic.

When we arrive at the entrance of town the soldiers looking at the sky.

I likewise look at the sky not much like earlier, which make the 2 moons illuminate to give us some light. Instantly it felt like the bright left us and darkness covered us.

And the grounds are more than 100 thousand lower ranked dragons called quasi dragons like wyvern, dragons and serpent, 100 also medium dragons like hydra and imogi and 11 high dragons like red, ice, lightning, and poison dragons covered the two moons. Their average size is approximately 7 meters or 2 story building. 

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I think I'm going to stand here and watch what will happen and also I'm curious why they invaded other lands.

Dragons are all arrogant and proud of themselves because they imagine they are one of the strongest species in this universe that's why they have too much pride than humans especially high ranking dragons. 

And also they will not invade if there are no reason. Dragons love, peace and like to live like a hermit and stay their nest for eternity, they think it's a blessing if no one will annoy them.

I'm actually curious what make them go mad like this to invade this planet.

They keep flying until 2 km out from the city and stop midway.

Ned: They really huge looks like a moving castle.

Seam seems a little frightened and have sweat on his forehead. 

The soldiers and citizens gasps when they witnessed the red big dragon on the front with a height and width of 50 meters or 14 story building. 

The citizens tremble and some soldiers seemed scared. They imagine it's like we are ants in front of a giants.

One highest ranked red dragon on the front with a red, scaly all of his body, 2 sharp claws and teeth, 2 feet's and two arms with a pair of red flame wings on his spine.

The red dragon shouted and talk in human voice communication.

Red dragon: Humans! Die or survive. We are the new owner of this planet better leave this planet to us.

Oh! Interesting I should listen and remain quiet for now.

Sem stare on my eye and I nod.

I know exactly what he meant. Those eyes that didn't fear death and he trust me too.

Sem: Sir! I'm the mayor of this city. Since I was a child, I have a pile of memories here and I love this city and most of us here live for centuries. Can we negotiate other things. 

This planet is huge heres my suggestion can we live together?

The red dragon shouted and seems really angry when he got reprimanded.

Red dragon: Despicable!!! Humans! You want us to negotiate and live together with less and the weakest creature in the world? Despicable!!! Die Humans!.

The red dragon attacks the barrier using a ball full fire with his mouth (on earth its called fireball) with a diameter of 10meters.

When the fireball hit the barrier.

Bang!

The barrier shook and tremble and have a little crack in it.

The citizens seem scared. The youngsters and babies are crying.

I believe if they attack 4-5 times this barrier will disseminate.

This dragon really has too much pride we can simply live together. 

Red dragon: Hahaha! You want us to dwell with you? Your barrier can't even hold for 1 min. Die!

At present all the dragons commencement to attack the barrier.

Kill all the humans.

Wipe out all of them!

Consume them!

Obliterate them!

The dragons keep shouting.

The crimson dragon, creating a fireball again to attack.

I think it's time for me to move.

When he almost release the fireball. 

I instantly release my strength and kick the ground and get in front of the red dragon.

His eyes seem so taken aback when I arrive and saw my facial expression, but the dragon has already condenses the fireball into his lip and fired.

I hold the hilt draw my sword and slash!!!.

I cut the fireball vertically and bisected the dragon  instantaneously and the fireball explodes. 

Boom! 

I didn't duck when the fireball explodes because it can't hurt me at all.

The body of the 50 meters red dragon that I cut in half drop into the ground.

Boom! Boom! This made the ground tremble because the body is hence large.