Nijin and Det go to the strongest man in the universe. They show the sword to the strongest in the universe, and now that the strongest in the universe has collected the 3 keys, he is no longer the key.
They tell the story of the sword. At the beginning of time, only a few people lived. Billions of years before the Earth was formed, a meteor was passing through space, but no meteor was similar to it. He was emitting a very powerful energy.
At that time, there was a blacksmith who was very good at his job, he found the meteor and made a sword with it, but he didn't know what would happen. After a while, the whole universe went after the sword.
As a solution, they divided the sword into 3 pieces, gave one to the strongest in the universe, and it was always transferred to the strongest in the next universe. They locked someone in the lost dimension.
In the end, he was protected by the time prison, but a great war broke out. The boss used to be there too, he must have stolen it from the safe while escaping from there. The stronger the person using this sword, the stronger it becomes. So it depends on the strength of the person using the sword.
This sword can kill anything living or non-living, even the undead. Nijin asks, "I wasn't the strongest in the universe, why did you give it to me?" The strongest in the universe replies, "I am old now and you have the potential to surpass me. You will be the strongest in the next universe," but you have to defeat me first.
Nijin says, "Let's get started." The two sides clash swords very quickly and exceed the speed of sound when fighting. They both know the perfect sword art. Nijin is slightly superior.
The war lasts 1 day and both sides are tired. Nijin uses the weapon boost and puts everything into his final attack. The sword of the strongest in the universe begins to shine, like a rainbow.
When the swords collide, both sides are stuck to the wall and both sides are tired. The first one to stand up would win, and Nijin was slowly getting up. The strongest man in the universe falls just as he is getting up, and Nijin wins, and now Nijin is the strongest man in the universe.
The strongest of the old universe congratulates, "You are the strongest now." Det congratulates him and says that Nijin is the strongest in the universe.
Since Nijin and Det are the strongest in the universe, they set out to defeat the boss of the universe. They travel into white space, deep in space, and encounter enemies lurking there.
Nijin defeats them in one move and they go to the planet where the boss of the universe is. There they see a giant castle, and the boss's castle is 10 times bigger than it. The castle rises above the clouds and they enter by smashing the giant door.
They arrived at the boss of the universe and the boss said, "Welcome, I've been waiting for this moment for centuries."