The reason for such caution was entirely because Thunder Island belonged to the Dragon Fighting Arena.
That also meant that the people in the Dragon Fighting Arena would absolutely not use love to influence these Dragons, or raise some Dragons from a young age; they would directly beat those Dragons into submission and turn them into slaves.
Therefore, the guards in the Dragon Fighting Arena must also be Dragon Knights, and since they deal with Dragons year-round, they must understand the characteristics of Dragons even better!
Moreover, the people of the Dragon Fighting Arena would definitely have special methods to deal with those violent and disobedient Dragons, so they had to be careful.
Before departing, Hiccup said to Yaya, "Wait for my command here! You are our last resort!"
Yaya proudly raised her head, her six eyes looking at Hiccup as if to say, "Don't worry, I've got this."
Then, Night Fury took Hiccup directly into the air and set off towards Thunder Island.
Hiccup said to Peter, the captain of the Dragon Knight Second Squad, "Infiltrate immediately! Gather intelligence!"
Then, looking at Fishlegs, the chubby member of the Dragon Knight Third Squad, he said, "Launch your attack fifteen minutes after we pass through!"
Afterward, Hiccup looked at Astrid and said, "Don't rush the charge! Make sure to turn the Dragon Fighting Arena into a sea of fire first!"
Everyone responded in unison, "Understood!"
Then, the three Dragon Knight teams quickly separated, each carrying out their respective orders.
At this moment, there were only a few isolated watchtowers on Thunder Island, but they were completely empty.
After all, the blizzard had not yet passed, and the watchtowers were covered in snow, resembling ice sculptures, with even lower temperatures inside, making them uninhabitable.
Furthermore, the people of Thunder Island did not believe anyone would dare to attack, so in their eyes, the watchtowers were merely useless decorations.
So Peter easily led his people to occupy the watchtowers!
From the watchtowers, the situation on Thunder Island was completely visible, so Peter directly signaled Hiccup and his team with flags.
Hiccup looked at the information Peter sent back and murmured to himself, "If only we had radio!"
However, flag signals were sufficient for now, and they definitely outclassed the communication methods of this era.
The message Peter sent back said, "Thunder Island is full of elaborately dressed nobles! They are watching a Dragon fighting competition! There aren't many guards on the island, and no Dragon Knights have been spotted!"
After seeing this message through his telescope, Hiccup decided to change his strategy. He said to Astrid, "Don't harm those spectators! Just scare them away!"
"Our targets are Thunder Island and the Dragons imprisoned there!"
"Understood!"
Then Hiccup directly patted Night Fury's neck.
"Roar~!"
Night Fury immediately let out the signal for attack on Hiccup's behalf.
Upon hearing the command, Peter quickly led the members of his small squad to spit fireballs downwards from above the watchtower.
And while attacking, they also expanded the range of their assault, and at the same time, the Dragon Riders on their Dragons' backs did not forget to throw smoke bombs towards the Dragon Fighting Arena!
Making the entire scene even more chaotic, not only were the Dragon Knights throwing smoke bombs, but the Knights riding Two-Headed Dragons were also controlling their Two-Headed Dragons, under the cover of the smoke bombs, to emit even denser green smoke.
Due to the effect of the smoke bombs, the guards on Thunder Island instantly lost their vision. When the Two-Headed Dragons entered the arena and emitted even denser green smoke, Thunder Island was immediately enveloped in green smoke, and nothing could be seen.
The people inside immediately fell into chaos, beginning to panic and flee.
"Oh my god, someone actually dared to attack Thunder Island!"
"Run, run, the Dragons are here for revenge! If we stay here, we'll definitely become their dinner!"
"Don't block my way! Get out of my way, you filthy slave!"
"Where have the guards of Thunder Island gone? Can't they see someone is attacking?"
"What is this green smoke? Why do I feel so dizzy!?"
The smoke was too dense, even though the people of Thunder Island knew that if a fire was lit, the smoke could explode instantly.
However, if an explosion occurred, these nobles, who were not wearing armor, would certainly be severely injured.
Now the crowd was in chaos, and they had no idea which direction the enemy was coming from.
At some unknown point, a group of Dragon Knights wearing gas masks had infiltrated Thunder Island and silently dealt with the perimeter guards of Thunder Island.
"Boom~~"
After dealing with these guards, the Dragon Riders mounted their Dragons and then unleashed a barrage of attacks directly at the high walls of Thunder Island.
Due to the extremely dense attacks, the entire Thunder Island began to shake, as if an earthquake had occurred.
Perhaps being passively attacked made the people of Thunder Island sober up.
"When did these Dragons become so smart? There must be Dragon Knights causing trouble!"
"Quickly take our people to see what's happening outside, why would someone attack our Thunder Island!"
"Go immediately and capture those Dragon Knights who don't know what's good for them! I want to know who instructed them!"
After all, Thunder Island, this Dragon Fighting Arena, could be said to be raking in money daily; nobles came here every day to gamble on Dragons, bringing a large amount of wealth to Thunder Island.
So Thunder had long become a thorn in the side of those people, who all wanted to come and get a piece of the pie.
For a moment, many faces flashed through Ragnar's mind, but he ruled them out one by one.
After all, not many people had the strength to attack Thunder Island, and there were only a few who had Dragon Knight teams; even if they came to attack Thunder Island, the result would only be mutual destruction.
For those as cunning as foxes, this would definitely be a particularly unprofitable endeavor.
Everything could only be known after the Dragon Knights of Thunder Island captured those people.
"Roar~!"
Hearing the unfamiliar Dragon roar, Hiccup knew that the Dragon Knights of Thunder Island had charged out!
Seeing those Dragon Knights riding Steel Whip Dragons, Hiccup murmured to himself, "It's just as I thought! These people also have Dragon Knights!"
Then Hiccup put on his special helmet and said, "Kill!"
The Dragon Knights riding Steel Whip Dragons on the opposite side also charged forward without a word.
These Steel Whip Dragons were covered in a layer of metal scales, and ordinary Bows and crossbows could not penetrate their scales, so these Dragon Knights primarily engaged in close combat.
It was just unfortunate for him that he encountered Hiccup.
Moreover, the Dragon Knights around Hiccup all possessed magic potions, making it easy for them to pierce the Steel Whip Dragons' metal scales with Bows and crossbows...