The strongest man in the universe calls Nijin and Det to him and tells them everything they have experienced. He also tells what the boss said and says, "So he was alive, my first enemy, I used to try hard to defeat him.
Now he is stronger than me and now he is the boss of the universe. "You have to get stronger to defeat him," he says. Nijin takes out a key from the Boss's universal ring. The key was found in an unidentified form by the system.
The strongest in the universe explains that Nijin's sword is actually a key. Nijin says that the sword will not eat anymore, and the strongest in the universe begins to ask "Why?" Nijin says that the sword has reached its power limit, and the strongest in the universe says, "That's all it takes, and 2 keys need to come together to pass that limit."
Nijin and the universe's strongest combine the keys and the universe's strongest's ancient weapon is revealed. It is a weapon that can take the shape of a weapon at will, but Nijin preferred to use it as a sword.
The strongest man in the universe adds, "There is actually a key and a lock in your sword." Nijin asked, "Is there a lock on the map too?" he asks. The most powerful man in the universe replies, "Yes, but in a lost dimension. I searched a lot when I was young, but I couldn't find it because it kept moving."
Nijin says, "I understand, but I received the map a year ago. I can't go anymore because I'm old, but you can go" and gives the map.
Nijin looks at the map and says, "The map is empty." "He guides you when you go to the empty but lost dimension," explains the most powerful one in the universe.
Nijin and Det set out by examining the map given by the most powerful person in the universe. Even though the map seems empty, it will guide them when they go to the lost dimension. Nijin and Det set out by taking armor from the strongest in the universe.
Their armor was nearly at breaking point, but the strongest in the universe repaired them in a matter of days. He also gives two rings to Nijin and Det. Thanks to these rings, they will be able to breathe in the lost dimension, because to get there it is necessary to pass through lost space.
The strongest in the universe allows Nijin and Det to cut through space and open the way to lost space. Nijin and Det see such a place for the first time. It was an endless place and they saw a castle, but there was a labyrinth to get there.
The strongest in the universe takes his sword and cuts through space, opening the way to lost space. Continuing on this road, Nijin and Det see such a place for the first time. What seems like an endless place and what they see as a castle has a labyrinth to get there.
There is always a guard guarding the entrance to the labyrinth, and this time too. However, Nijin and Det are very strong as they are lvl 1500 and they are easily defeated by the guard. As no one can stop them on their way, Nijin gets bored and wants to see the end of the maze.
He charges his sword and strikes with all his strength, breaking the walls of the labyrinth and only seeing the exit. They go there and see the map starting to take shape. The map says, "The lock is inside only one door, find it among 1000 doors."
Nijin and Det enter gate 31 and see that the map is right. When they enter the door, the map also lights up and they see a wall at the end of the road. "Isn't this the right way?" While trying to break the wall, a person comes and says, "Don't break it, I'm here to show you the way."
"I am the seer and I saw you in the prophecy. You are the chosen ones who will open the lock here," he says and the lock appears in front of them. Nijin transforms his sword into a key form and opens the lock. The sword returns to its normal shape and a temple appears in front of them. This temple has been locked since the beginning of time, and inside lies a key, the last piece of the key.
The sword begins to speak, "Are you worthy of taking me? If you defeat me, you will be my owner," and the duel begins. Nijin uses his divine sword arts but cannot defeat.
When Nijin enters the temple, the sword starts talking. "Are you worthy to take me? If you defeat me, you will be my owner," he says. Nijin and the sword start a duel. Nijin uses the divine sword arts but cannot defeat the sword. As Nijin's last resort, he puts all his powers into the final attack as a weapon boost.
The sword repels Nijin's attack and says, "You are my new master." Nijin combines the two keys in his hand with the other keys and the most powerful weapon in the universe becomes its final form.
Nijin and Det go out of the temple and the labyrinth returns to its former state. "Are we going to pass through here again?" Just as he was washing it, Det stops him and says, "I have a teleportation ring, remember?" he says. Nijin and Det go to the strongest man in the universe.