Black Mountain Castle is a group of caves carved and prepared to become a castle inside the mountain. It was said that it existed hundreds of years ago, and it is now the palace of the new king.

It is a prison for the enemies of the new king. The castle and its aura have always caused panic in the hearts of those who see it. However, now it has become more frightening because of the sounds of prisoners being tortured inside it.

A woman in her twenties, tall, with beautiful features, with long black hair, was walking between the cells slowly, the sound of her heels muted all the voices, no one dared to breathe, and they muffled their groans.

This beautiful woman in tight clothes and her short skirt revealing graceful legs was the one who liked the most to torture among the six assassins.

The whip in her hand was not an ordinary weapon, it was a holy weapon, as soon as it touches someone's skin, it seals their powers. It also contains thorns drenched in a unique poison that doubles the amount of sensation with pain. These thorns enter into the body of its victim with each stroke on the flesh. When they are pulled, prisoners would feel that their soul is being pulled.

*tack*

The sound of heels that were being heard in the corridor stopped, the cell door opened, and the lady stood in front of the red-skinned young man hanging by chains by his hands and looked at him with a disdain look.

“Sixth, did you miss your older sister? Why don’t you answer me? Did I hurt you a lot last night?”

Slowly she put her hand on his body, which was torn from the torture, and on her face features of ecstasy, then she licked the blood that was stuck on her fingers.

The young man raised his head and answered her in a weak voice.

"When will he come back? How long do I have to wait?"

The Fifth laughed and, in a sweet voice, whispered to him.

"Oh, are you tired of being with me? And I'm the one who came especially for you. You've always been mean to me."

"Awooo"

The sound of a wolf howling stopped Fifth from what she was doing.

She turned around to find a fat young man with chubby cheeks standing behind the huge wolf whose height exceeded a meter.

The fourth brother was a beast tamer, and he was in charge of managing the affairs of Ancestral Island. His training level was low, but his intelligence and ingenuity in managing the kingdom's affairs allowed him to take a number in the special squad.

*ahem ahem*

The fourth coughed two times, and in a calm voice, he spoke to them.

“The master has arrived, so stop fooling around and……(suddenly shout) traitor, why did you release him?”

*boom*

Before the girl could understand what had happened, she received a kick in her chest that threw her away and hit the wall. Because of sixth's enormous physical strength, the girl lost her consciousness.

Sixth took advantage of the situation and picked up Fifth whip from the ground.

"Attack him, rip him," said Four.

The fat man yelled at the wolf, and the latter began to growl as he prepared to pounce on his prey.

The sixth smiled and, with a wave of the whip, calmed the giant wolf, ignoring the orders of his master.

"You idiot, you're supposed to be the smartest one, but you didn't find out that Miss Fifth had tamed your wolf-beast."

The fat man realized that the wolf in front of him was no longer under his control and discovered that he had been betrayed, but it was too late now.

"Let's get back to our topic, what were you screaming about before ... ah, I remembered...("Attack him, tear him up")"

The raging wolf jumped on the fat fourth brother and ripped his neck with its fangs, blood splashing and staining the floor of the cell red. In an instant, the fourth died, without even being able to scream.

With steady steps, the sixth went towards one of the prisoners, and after he freed him, he handed him the whip in his hand and said:

"The giant wolf over there will obey you as long as the whip is in your hand, with him by your side, you have nothing to fear and bypassing the guards will not be a problem, but remember that the beast has a true master, so what will happen if his master woke up?"

He pointed to the unconscious girl with his hand and did not add another word. Of course, the prisoner understood perfectly what he meant.

Indifferent to the words of thanks, the Sixth walked out to the Throne Hall, ignoring the sound of the Fifth's screaming and the guards fighting with the giant wolf.

He was staring at the giant, wide-open door, facing his last opponent.

"My dear child, you broke your old father's heart. Is that how you pay me for raising you all those years? Is that how a righteous son supposed to be?"

The throne room was a huge cave. From its roof hung a giant chandelier decorated with golden skulls. The throne chair was black, and on that chair sat a man in his fifties with long white hair and crimson eyes.

His face was covered with a light beard, and although he was in his fifties, he was thin, and wrinkles filled his face, and due to the reflections of his poison technique, his body began to weaken day by day, but not enough for someone to dare to stand in his face,

with a deep voice, he spoke. "Tell me, how did you get rid of your five brothers and sisters?"

Sixth advanced with steady steps towards the king and answered the question as if he was submitting a report on one of his tasks, as usual.

“This task, I wouldn't even classify as first-rate one, as the saying goes, a house divided against itself cannot stand. Killing Second was inevitable. That man hates me. Third acted on his own and killed First's lover, so he paid the price with his life for that. And you know First personality, he was overwhelmed by guilt, so he isolated himself in some temple. There is no need to mention Fifth and Four. Until today, I do not know why you gave them numbers in the first place."

*haha*

the old man's crazy laugh shook the throne room. “Oh, you look like me. We are two sides of the same coin. Killing you will grieve me, perhaps more than killing my sister. My sadness of killing you may come close to the day I learned of my mother’s suicide. This is unfortunate, but next time I will not choose you.”

Jin didn't understand his last sentence, but he didn't have time to think about it. In a blink of an eye, the old man disappeared from the throne to appear in front of Sixth.

*whoosh*

The king's sword had pierced Sixth's chest. In the silent room, blood could be heard pouring on the floor.

Even though the smile was wide on Sixth's face, while the king was furious and furrowed his eyebrows, the boy didn't resist and didn't try to avoid his attack, which means one thing.

"Trap, you used yourself as bait. What are you planning to do?"

Sixth held the king's hand tightly, and the frightening smile never left his face. “Of course, it is a trap. I know that you found a way to avoid death, so I prepared something special for you.”

On Sixth's chest, a golden-colored magic circle appeared that shimmered, and he began to chant incantations audibly.

“Savi…. Dina….. Kata……..ba……..bahu….. with….. Bali………….. ……………”

The more he raised his voice. The more golden light covered his entire body. The king's face turned black as he tried to get away but couldn't escape Sixth's strong fist.

The golden light continued to shine until it covered the entire hall. Then, a blinding light engulfed the whole stone castle for a few seconds. Finally, Sixth loosened his fist, and the king jumped back, and although the light damaged his eyes, he could tell that he was still fine.

"Whatever you wanted to do, it has not wo..., what is this pain that overwhelms me, what is this fire that eats my bones."

Slowly he opened his eyes to find a smiling face opposite him, but the smiling face he saw was not Sixth's but his own.

He finally understood what the spell was. It is a spell for exchanging bodies, he was now dying in Sixth's body, not because of the sword that was stuck in his chest. Sixth's strong body was modified with the ability to regenerate cells and would not easily fall because of a wound like this.

The reason why he was dying now was because of the poison the sword contained that was now melting his body from the inside.

*bam*

Sixth's body inhabited by the king's soul fell on the floor, letting out his last crazy laugh. "Nice move, boy, you made me die with my poison. You are my greatest achievement."

The smile did not leave his face in his last moments, and he began to repeat.

"You are the best among my sons ... two sides of the same coin.