Therefore, after stating his ultimate vision and discussing it with Aira, this technique, in addition to being called Self-Modification Technique, also acquired another name: Elementary Modification Technique.
Aira taught Rhode two techniques, and Rhode also taught her some techniques that Aira could use, such as Kaio-ken, Energy Disc, and Tri-Beam. These techniques all had miraculous effects under specific circumstances.
After an exchange and mutual learning, and after undergoing Self-Modification and increasing their lifespan limits, the two entered the Time Chamber together to spar and increase their power. After Aira successfully transformed into Super Saiyan and broke through her bottleneck, her power increase speed accelerated again. Therefore, she needed to utilize the Time Chamber's internal and external time difference to reach her limit in the shortest possible time.
In fact, that was precisely what happened. After just a few years inside the Time Chamber, which was only a few days in the real world, Aira, under Rhode's training, not only reached Super Saiyan Full Power but also pushed her base form power to the limit of one billion Battle Power. After her base form Battle Power exceeded one billion, Aira's power increase speed immediately slowed down.
In contrast, when Rhode and Gohan emerged from the Time Chamber, his base form Battle Power was over 300 million, and his Super Saiyan form had reached Super Saiyan Full Power. However, later, under Porunga's potential unlocking, his base form power surged to eight or nine hundred million Battle Power, and he also broke through the limits of Super Saiyan and Super Saiyan 2. In other words, Rhode's current base form Battle Power limit had already exceeded one billion. As for what level his new limit was, he would only know once he reached it.
During several years in the Time Chamber, sparring with Aira, Rhode's base form Battle Power had already exceeded three billion, but the rate of increase showed no signs of slowing down. It seemed that after breaking through Super Saiyan 2, the base form's power limit became very high; he estimated it to be at least in the tens of billions.
Thinking that Rhode had already reached Super Saiyan 2 and his power had reached its limit, Aira, who continued to break through, couldn't help but ask him curiously, "Rhode, how did you break through Super Saiyan 2?"
"Uh, when Gohan made his wish to Porunga before, he gave me the remaining two wishes. I asked Porunga to help me unlock my potential." Hearing Aira's question, Rhode didn't conceal it. Although Rhode at that time hadn't cultivated his base form to the limit of over one billion Battle Power, he had already reached Super Saiyan Full Power, just a step away from Super Saiyan 2. Therefore, with Porunga unlocking his potential and guiding him, he broke through that limit.
"A wish from Shenron?" Hearing Rhode's words, Aira was a little surprised, and she fell into thought while pondering. Just having Shenron unlock her potential wasn't a problem, but if possible, Aira still wanted to break through through her own efforts.
Thinking this, she looked at Rhode: "How is your mastery of Super Saiyan 2 now?"
"What do you mean?" Seeing Aira ask this, Rhode was a bit confused, but he still answered honestly: "It's just to the extent of being able to transform; I haven't specifically trained it yet. Do you have any ideas?"
"Indeed!" Facing Rhode's words, Aira nodded, then said, "Can your clone transform into Super Saiyan 2?"
"Clone?" Hearing Aira's words, Rhode paused, but thinking of her current situation, he immediately understood Aira's intention: "Are you planning to have my clone transform into Super Saiyan 2 to spar with you?"
At this moment, the difference in base form power between Aira and Rhode was roughly three times. Once Rhode transformed into Super Saiyan 2, with a hundredfold amplification, even if Aira transformed into Super Saiyan and also used the Self-Evolution Technique, she wouldn't be able to bridge this gap. However, Aira felt it would be too much of a waste of Rhode's time to simply have him train her in his Super Saiyan 2 state. So, if Rhode's clone could also transform into Super Saiyan 2, then by allocating a reasonable amount of power, it could both spar with her and not delay his own training.
"I did think that, but it seems a bit difficult!" Knowing Rhode's mastery of Super Saiyan 2, Aira understood that this idea was somewhat unrealistic.
"We don't need to be so formal with each other. Didn't I also train with you before?" With his thoughts racing, Rhode understood Aira's concerns and couldn't help but say so.
"That's because your base form is strong. Even in your base form, with Great Ape Power, you can spar with me without delay!" Seeing Rhode say this, Aira still stuck to her idea. Before was before, now is now. Before, although their power and states were different, their power could be maintained at a similar level.
In that situation, training together, everyone could improve, without delaying either. But now, Rhode's base form power was already much stronger, and transforming into Super Saiyan 2 would make it even more so. If he continued to spar with her, it would be a waste of his time.
"Haha, you're really overthinking it!" Seeing Aira's persistence, Rhode couldn't help but laugh and say, "Even if I transform into Super Saiyan 2, it won't delay my training when we spar together now!"
"How can that be?" Hearing Rhode say this, Aira only thought he was comforting her.
At this moment, looking at the stubborn Aira, Rhode was a bit dumbfounded, only feeling that she was somewhat adorably silly. "My mastery of Super Saiyan 2 is only in the initial stage, so simply fighting in this state is already training!" In his helplessness, Rhode had to explain a bit. "And you need to fight with all your might and stimulate your potential to break through Super Saiyan 2. In this way, we can train together, but during the training, you might get injured!" Speaking of this, Rhode looked at Aira at the moment, with a smile on his face: "However, merely getting injured shouldn't be a problem for you, who have been modified by the Self-Modification Technique, right?"
"Huh?" Upon hearing Rhode's words, Aira, who was slow to realize, instantly understood, and then, thinking of her previous insistence, her cheeks immediately turned crimson. Why did she suddenly get so fixated? At this moment, Aira was full of questions about her previous persistence.
"Alright, don't overthink it, let's begin!" Seeing Aira fall into thought, Rhode, who roughly guessed her thoughts, instantly transformed into Super Saiyan 2 and called out to her. Why did Aira suddenly get so fixated? Perhaps this was what was meant by 'concern leads to confusion.'
"Okay!" Hearing Rhode's words, Aira stopped dwelling on it and focused on her training. Transforming into Super Saiyan and then using the Self-Evolution Technique, she immediately engaged Rhode in battle.
However, Aira's power was ultimately a bit lacking; she was constantly injured in her battle with Rhode, but relying on her powerful recovery ability after modification, she was sent flying again and again, and charged back again and again. Time passed bit by bit, and Aira also pushed her power to the extreme amidst her constantly rising battle intent, slowly eroding the boundary between Super Saiyan and Super Saiyan 2.
As Aira continuously approached Super Saiyan 2, Rhode's mastery of Super Saiyan 2 power also became increasingly proficient. From initial grasp, to proficient mastery, then to complete mastery, and finally to perfect control, he ultimately reached a level similar to Super Saiyan Full Power.