At this moment, Bulma quickly interjected, "Forget it, let's not talk about it anymore. No matter how long it takes to gather the energy, we have to do it. Once we have it, we can go and save the future world."
"Right, Trunks, what type of energy does the time machine require?"
Trunks was taken aback and replied, "I don't know, but my future mom left a notebook with the time machine. I'll go get it."
The older Trunks walked to the time machine in the yard, took out a notebook, and handed it to Bulma.
Bulma opened the notebook and immediately found the energy required to operate the time machine. "Ah, so the energy to run the time machine is the 15th type of green liquid energy. Our company is currently researching its use. Filling up a tube of energy only takes a day."
"Just one day? That's fantastic! Then tomorrow, we can go to the future world and help Trunks eliminate Black John Doe," Goku exclaimed happily.
John Doe spoke up at this moment, "You seem to be very interested in defeating that guy who has my body."
Goku rubbed his nose and said, "Hehe, John Doe, we can't fight to the death in this world. So every time we clash, it's usually a draw. But with the guy in the future, I don't have to hold back. I must beat you once."
Vegeta spoke up at this point, "No, I'll take care of that guy. I want to defeat him myself."
Seeing Goku and Vegeta's eagerness to fight, John Doe sighed. These two really wanted to beat him.
At this moment, Beerus spoke up, "Manipulating time is a serious crime. Once discovered, the perpetrator will be immediately destroyed."
Hearing Beerus' words, the older Trunks didn't know who he was, but seeing his dad and uncle showing respect, he knew he wasn't an ordinary person.
So the older Trunks knelt before Beerus and pleaded, "Lord Beerus, I beg you, please spare us this once. The future is truly difficult. If we don't go back, Earth will be destroyed by them."
"And I don't believe they'll only destroy Earth. They'll also destroy other planets. So I beg you, please approve this action."
Goku, standing next to Beerus, raised his thumb and index finger, creating a gap between them, and said, "Lord Beerus, please give us a little leeway."
Beerus looked at the older Trunks kneeling before him, hesitating whether to approve.
Whis spoke up, "Right, Trunks, in the future, why didn't the God of Destruction stop Black John Doe from massacring humans?"
The older Trunks replied, "What God of Destruction? I've only heard of the Supreme Kai, but I've never seen the God of Destruction." His answer startled Beerus.
Beerus immediately asked anxiously, "How can there be no God of Destruction? I am the God of Destruction! Is it possible that I never appeared in the future?"
Before the older Trunks could respond, Beerus suddenly thought of something and asked, "Wait, you said the Supreme Kai led you against Majin Buu. I want to ask, during the fight with Majin Buu, did anything happen to the Supreme Kai?"
The older Trunks answered, "Yes, the Supreme Kai was killed by Dabura."
The older Trunks' words shocked Beerus, and even Whis showed a slight look of surprise.
Beerus exclaimed, "Is the Supreme Kai an idiot? Doesn't he know how important his position is?"
Seeing Beerus' anger, John Doe and the others were puzzled as to why he was so concerned about the Supreme Kai's death.
Whis, sensing everyone's confusion, explained with a smile, "The Supreme Kai and the God of Destruction are two individuals with one life, connected by life and death."
"If either of them dies, the other will follow. From a temporal perspective, when the Supreme Kai died, the future Beerus was probably still asleep, so he died mysteriously."
Everyone present was shocked. They never expected the Supreme Kai and the God of Destruction to have such a relationship.
After hearing Whis' explanation, Beerus immediately became displeased and shouted at Whis, "Whis, how could you reveal this secret to others?"
After saying this, Beerus looked at John Doe and the others seriously. They quickly shook their heads and said, "Lord Beerus, we will definitely keep this secret. We won't leak it."
Beerus thought for a moment and said, "Forget it, I trust you. The biggest problem isn't with you, but with the Supreme Kai. If he continues to be so adventurous, even if no one knows this secret, he will die at the hands of a mysterious enemy, just like in the future world."
John Doe suggested, "Lord Beerus, you can gather the seven Super Dragon Balls and wish for the Supreme Kai to become immortal. Then you won't have to worry."
Hearing John Doe's suggestion, Beerus clapped his hands and said, "You're really smart, kid. This is a great idea. Just for this suggestion, I approve of your time travel."
"Thank you, Lord Beerus," everyone immediately thanked him.
"But you must promise me to beat that John Doe guy into a pulp. I don't like him," Beerus said sternly.
"Don't worry, Lord Beerus," Goku and Vegeta said confidently.
Then Goku turned to the older Trunks and said, "Trunks, let's have a match. Let's see how your strength compares to Black John Doe."
"Okay, Uncle Goku," the older Trunks drew his great sword, ready to fight Goku.
John Doe spoke up in dissatisfaction, "Goku, shouldn't I be the one fighting Trunks? You and Black John Doe aren't the same person."
Goku smiled and said, "John Doe, don't be so rigid. Our strengths are similar. It's the same whether I fight you or Trunks."
After saying this, Goku, without transforming, said to the older Trunks, "Come on, Trunks, let me see how far you've progressed in the future."