The pirates sat and forgot, and they really believed the nine truths and one lie.

Impel Downs, where the most heinous pirates are imprisoned, has an administrative status equivalent to that of the Navy Headquarters. The overall building is a huge tower-shaped structure built in the doldrums.

The sea kings that swim freely in the doldrums are the natural barrier of the underwater prison. If ordinary ships rely only on wind energy and have no other power sources, entering the doldrums would be tantamount to seeking death.

The people of Impel Down who want to escort prisoners in and out have to pass through the special ocean current of the Gate of Justice, which presents a triangular circulating ocean current, making Judicial Island, Marinford, and Impel Down form a horn.

The system was initially designed so that if one side was in trouble, both sides could send reinforcements, but the reality was that the agents stationed on Judicial Island were too weak, and the powerful navy had its own ideas and did not want to care about the lives of the two friendly neighboring departments.

Impel Down Castle can only close its doors and form its own independent system. For hundreds of years, it has suppressed pirates sent by the navy and has never been breached by outsiders. There have only been a few cases where pirates have escaped.

The Golden Lion was able to fly after cutting off his own legs thanks to the power of his Float-Float Fruit. Commander Mori of the Revolutionary Army was imprisoned for hundreds of years before he managed to escape from prison by using the power of the Push-Push Fruit.

If pirates want to escape from Impel Down from the inside, it is impossible without some special skills. Today, Impel Down finally welcomes its own wall breaker!

On the first floor of the city's sea, there is a part reserved for civilian staff to use as offices. Pirates are baptized and tortured here before being imprisoned, and are asked to explain their crimes.

After that, he will be taken to the only elevator in Impel Down, and the prison guards will send him to the underwater prison that belongs to him according to the bounty of the pirate and the degree of his crime.

There are no less than ten naval warships surrounding the outer perimeter at sea. The observation post on duty today first noticed that the Gate of Justice on the navy side was destroyed.

"Dragon? Black dragon"!

The prison finally spotted the dragon-like form of Acnologia. In response to the unknown dragon's ill intentions, the city immediately sounded the highest alarm.

In the warden's office on the fourth floor under the sea, a message was received a moment later that the observation post on the top floor had discovered a dragon appeared near the Gate of Justice, and it was a black dragon that had never been seen before!

"Mythical beast, dragon-type ability user, today is the day that will decide the fate of Impel Down."

Magellan stood up from his seat. He had been on guard against the Joker Pirates' surprise attack. Today, the attack finally arrived, and he felt relieved. All these days of waiting were not in vain.

Hannibal rushed into the warden's office. He was very scared now. He was afraid that Impel Down would be destroyed by the Joker Pirates. Not only would he lose his job, but his life would also be in danger.

"Director, please think of a solution quickly. The Joker Pirates are about to attack. How about we take everyone and run away?"

Hannibal is not very loyal to the Celestial Dragons. He just likes the seat under Magellan and wants to be the highest commander of Impel Down, but the prerequisite is that his life is not in danger.

"Hannibal, don't say such discouraging words. As long as I am alive, I will stop the Joker Pirates and convey my orders to the prison guards on all levels to be on high alert. Even if it means death, we must die in this position."

Magellan's heartless words made Hannima sweat profusely. He could feel the director's murderous intent, and being a coward, he couldn't say anything more.

"Won't the people from the Knights of God come to reinforce us?"

"Of course you don't know, you idiot. Go back to your post. You are not needed to fight." Magellan straightened his clothes and patted Hannibal's shoulder to reassure his men a little.

Hannibal watched the director enter the exclusive elevator alone and head to the first floor above the sea to deal with the life-and-death crisis of Impel Down. If even he couldn't stop it, then Impel Down would be doomed!

"Even if I die, I will take the pirates with me"!

Hannibal muttered, and he also became ruthless in his heart. If the Joker Pirates wanted to break into the prison, they would not be able to do so. The worst that could happen was that they would all die together, and Impel Down would sink into the sea forever, becoming the burial place of both parties!

The information about the sighting of the Joker Pirates in Impel Down was later passed down layer by layer. Although Hannibal was timid and weak, he still had certain administrative abilities.

He has already started organizing his own people and preparing for defense. He will release the monsters imprisoned in Impel Down later to create trouble for the Joker Pirates.

There is also the most important sixth-level prison. No pirate can be let out. The one guarding this place, Shiryu of Rain, has also received an emergency notice, which allows him to retain the right to execute Barrett at any time.

"Lord Magellan, you are finally here!"

"That's the black dragon in the sky, the Joker Pirates' ship, docked near the Gate of Justice."

The director appeared on the first floor of the sea at the first moment. Everyone in the prison believed in Magellan's strength. His appearance stabilized people's hearts and allowed his originally timid colleagues to gradually regain some confidence.

Looking at the black dragon soaring in the wind near the sky above the Gate of Justice, Magellan's face turned ugly. He wondered what special abilities this mythical dragon-type beast had.

"Buggy the Clown, where did you recruit these cadres? Why would such a strong man follow a pirate?" Even though Magellan was at a distance from the Black Dragon, he could still feel the power of the mythical beast's dragon-type fruit ability user.

The black dragon's shadow covered half of the sky, and its black scales reflected a cold iron-like luster among the clouds.

Locked on the sea level, the huge steel gate that spans the sky and the earth, the Gate of Justice is the most important face of the Impel Down City. If it is lost, the role of the Impel Down City will be reduced by half.

"Pay attention to defense, I can't wait to take action"

The moment Magellan spoke, a low roar came from the depths of the black dragon's throat, and dark purple energy gathered between its fangs, condensing into a spiral of shadow breath.

It was neither fire nor lightning, but pure force of annihilation, accompanied by a roar strong enough to tear apart space, and it slammed into the giant steel gate like a falling meteor.

Amidst the deafening metallic wail, the Gate of Justice was ultimately unable to withstand the Black Dragon's roar, and a penetrating wound with a diameter of one hundred meters suddenly appeared, creating an actual hole that allowed the pirate ship to pass unimpeded.

An even more shocking scene unfolded behind them. The aftermath of the shadow energy transformed into a black shock wave that swept across the sea, splitting the huge waves in the middle, revealing the hideous rock faults on the seabed.

The sea water rolled to both sides like a living thing, forming two water walls hundreds of meters high. The ancient trench was exposed in the sunlight, and schools of fish jumped in panic in the vacuum zone.

Many unlucky sea kings were affected by the black dragon's roar and instantly disappeared in the sea without even the chance to scream.

The prison in the city of Impel Down was in a miserable state. They did not expect that the once indestructible Gate of Justice could only withstand one attack from the black dragon.

Amid the dragon's roar that resounded throughout the heavens and earth, the pirate ship flying the red-nosed clown flag passed through the hole in the Gate of Justice and gradually entered the internal current of Impel Down.

The Joker Pirates officially declared war on the Undersea Prison