After the banquet ended, Whis packed up plenty of food before leaving Bulma's House and returning to the God of Destruction Realm.
As a God of Destruction Candidate, Son Goku went along to familiarize himself with the procedures.
Half an hour later, the two arrived in the God of Destruction Realm.
Son Goku marveled at the boundless God of Destruction Realm and the countless planets suspended within it.
Whis said to Son Goku, "Goku, when I saw you training on the Red Giant earlier, were you using its gravity to train?"
Son Goku replied, "Yes, Whis. Conditions on Earth no longer allow me to create gravity strong enough, so I came up with this method."
Whis nodded, then continued, "As I recall, humans can't survive in space, let alone somewhere as hostile as the Red Giant. Besides, aren't you afraid that the time distortion caused by the Red Giant will separate you from your friends and family forever?"
Son Goku said, "I wished on the dragons of Earth and Planet Namek to eliminate all those drawbacks."
"Oh, so you used Lord Dragon God's power of miracles to eliminate those drawbacks. You're quite a clever one," Whis said with a smile.
Son Goku said, "Unfortunately, the dragon on Planet Namek has limited power. He could only eliminate the time effects on me caused by gravity up to ten billion times normal. Even a slightly larger red giant or a neutron star could probably produce that much gravity, never mind a black hole."
Hearing this, Whis said, "I see. Goku, I can help you with that."
Son Goku said, "Whis, can you really do it? The time effects caused by a black hole are enormous. I don't want to spend a few breaths inside one only to find that a thousand years have passed outside."
Whis smiled. "Goku, don't worry. My mastery of the law of time is quite good. I can handle this little request."
"All right, then, Whis. Let's see you work your magic!" Son Goku said.
Whis nodded, raised the Divine Staff, and pointed it at Son Goku. Brilliant light burst from the staff and enveloped Son Goku continuously.
Fifteen minutes later, the light vanished. Son Goku checked himself, but he felt no different, leaving him somewhat doubtful.
Seeing this, Whis asked Son Goku, "Goku, do you know how black holes cause time effects?"
Son Goku thought for a moment, then said, "A black hole's immense gravity stretches time. For example, a single second gets stretched into a year by the black hole, while time in the outside world remains unchanged. So when one second passes within the black hole's gravitational range, a year passes outside."
Whis said, "The theory of time is profound and complex, so I won't go into detail. Your explanation is simple, but more or less correct. What I did just now was reinforce the time around you, making sure even a black hole's gravity can't pull it out of shape. That eliminates the black hole's time effects on you."
Whis paused, then continued, "To put it another way, the time around you used to be as strong as a rubber band. A black hole could stretch it as far as it liked, or even snap it. After I cast my spell, the time around you lost its elasticity. A black hole can't stretch it at all, so naturally, its time effects on you disappear."
Understanding dawned on Son Goku. "Whis, listening to your explanation was like listening to your explanation."
Whis looked thoroughly exasperated. "Goku, in short, I've eliminated the time effects that a black hole's gravity would have on you. From now on, you can train on a black hole without worrying, provided your body is strong enough."
Son Goku nodded. "Thank you, Whis. I understand."
Whis continued, "We deities train differently from mortals. Mortals cultivate ki, while we cultivate godly power. In the early stages, godly power increases your strength slowly, but it raises your level of existence. In the later stages, your strength also increases rapidly. So, Goku, now that you've become a God of Destruction Candidate, you need to cultivate godly power as well."
"Whis, is this the godly power you're talking about?" Son Goku asked.
Whis's eyes widened. "Goku, you've already cultivated godly power? And your level of existence has actually reached that of a Supreme Kai!"
Son Goku said, "I also wished on Porunga to obtain a method for cultivating godly power, then started practicing it. In over a decade, I've only managed to cultivate this little bit of godly power. Better than nothing."
Whis's mouth twitched. You're a mortal, yet in just over a decade, you've cultivated your godly power to the level of a Supreme Kai. And you still think it's slow? Better than nothing? If the Supreme Kai heard that, he'd slap you across the face.
He said aloud, "I see. Goku, you've surprised me again. It seems that, apart from that divine technique, I have nothing left to teach you. How about this? Train on your own for now. Once you're strong enough, I'll teach you the Divine Technique of us angels."
Son Goku nodded. He knew the Divine Technique Whis was referring to was Ultra Instinct.
The reason he had agreed to become a God of Destruction Candidate was to learn Ultra Instinct and Beerus's destruction techniques.
Son Goku said, "Thank you, Whis. Since I don't need to train with you right now, I'll head back and train on my own."
Whis said, "Yes, Goku, you have your own training methods, so I shouldn't interfere too much. Go and train on your own. While you're at it, take care of some God of Destruction assignments whenever you have time."
Son Goku nodded. "Well then, goodbye, Whis. Come visit Earth whenever you're free."
Whis nodded with a smile, and Son Goku used Instant Transmission to return to Earth.
The others had yet to leave when Son Goku appeared before them.
Vegeta said, "Kakarot, didn't you become a God of Destruction Candidate? Why are you back already?"
Son Goku said, "I became a God of Destruction Candidate. That doesn't mean I moved into the God of Destruction Realm. Why can't I come back?"
Vegeta thought about it and found that reasonable. "Then don't you have to do anything as a God of Destruction Candidate? Is it just a title?"
Son Goku said, "Not exactly. A God of Destruction's job is to destroy planets that don't need to exist. Beerus is asleep, so I'll be handling those assignments."
"Tch, I thought it was some cushy job. That's all there is to it?" Vegeta said dismissively.
Son Goku smiled. "What do you know? Becoming a God of Destruction Candidate lets me learn God of Destruction Techniques and Angel Techniques, so I can improve my strength rapidly. That's why I agreed to take the position. Did you think I had nothing better to do?"
Hearing this, Vegeta said angrily, "Damn it, Kakarot! Why do all the good things always happen to you?"
Son Goku smiled. "Because I'm strong, of course. Do you think Whis would take just anyone?"
Piccolo nodded and said to Vegeta, "Vegeta, instead of standing here seething with envy, you'd be better off training hard. Whis said we could reach the level of a God of Destruction."
Vegeta nodded. The Green-Skinned Monster is right. I refuse to believe I won't catch up to Kakarot once I've trained to the level of a God of Destruction.
Before you continue