Broly The Saiyan of Legend!

Alea, Taro and Aize were excited because they wanted to see how they transformed. Since they were at least as strong as Cana normally, maybe they could get clues on how to transform as well by seeing it happen.

The city lord quickly gathered a 3-meter-tall and wide square box and connected it to some screens which showed the interior of it.

He turned around and his eyes repeatedly switched between Cana and Broly.

"So?? Who is going in first?"

Broly wryly smiled, before shaking his head.

"I think I will pass for now. I don't have much control over my emotions and worry that I will go berserk and raze your palace down."

"Oh. It affects your emotions?" He immediately wrote something down his notepad. After writing he looked up, at Cana.

"Cana could you please transform? Of course, if you don't want to, I understand. Then we can just talk about your whole teams' punishment instead. So, what do you say?" The city lord said with a sly smile on his face.

"No, no. It would be my pleasure!" Cana answered while walking into this box.

After she was inside, the city lord pressed a button and the door closed. He entered some commands on his control panel, before he pushed a red button.

"Cana can you hear me?"

After receiving a nod as an answer, he continued.

"Alright, you can go all out now. If you feel something going wrong just tell me."

"Understood."

Broly heard Taro gulp, he looked at the three and saw that they were currently highly focused. He focused back on Cana, but he didn't look at the screens but focused through the box on her lifeforce.

Cana started slowly rising her ki. Her muscles increased a bit before a golden flame enveloped her, her hair turned golden as well and the number for her power level displayed on one of the screens shot up. The box didn't seem to be affected by the energy, but it still leaked the immense pressure. Making the other Saiyans take a few steps back.

Broly noticed that the displayed number was actually higher than he expected. It should have been 200 million, but the power level displayed was twice as high with 400 million.

'Well considering the injuries she got and that she was healed multiple times, it is clear that she gained a few Zenkai boosts.'

There were also bunch of other numbers, which Broly couldn't identify, but he didn't bother with that anymore as he pondered about the way she transformed and compared it with his. He analyzed her lifeforce and observed as much as he could. He saw that most of her S-cells were located in her back. He also vaguely feels that she could only release part of her strength. She should be able to unearth more power of her S-cells.

'It should be the reason why Kakarot became a lot stronger after he went into the hyperbolic time chamber and attained Super Saiyan Full Power. By constantly being in a transformed state he not only bypassed the waste by transforming but was also able to use more power of the S-cells. The other grades from Vegeta and Trunks just forcibly increase their power output, they didn't use the hidden potential of their S-cells. That's why Kakarot was even stronger than the other Super Saiyan grades. A mastered Super Saiyan wouldn't only have a 50 times multiplier, but it should be even higher.'

"Incredible! Your strength increased fiftyfold!" The city lord already expected a tremendous increase in strength as he felt it from afar but seeing the data was an entirely different thing for him!

"Cana how long can you in this form?"

"In a fight the maximum should be ten minutes, it is quite straining on the body. Even if I didn't transform, I could only extend it for a bit."

"I see. Your ki itself changed a bit, it seems something is added to it. So, you can't power up even further, can you?"

"No, I can't increase it any further. I am already at my full power."

"Please explain how you feel right now."

"Well, except that my body feels pretty tense, I also feel like my whole body is pumped up with energy, oozing out. Although it feels exhausting to stay this way, it also feels extremely satisfying."

"Alright you can come out and relax a bit." By now the city lord couldn't be talked to anymore and just wrote into his notebook.

Cana was sweating after she came out but couldn't relax for a second as the other three Saiyans was asking her how she transformed in the first place.

She explained how she became so angry that she somehow pulled out this energy. She wasn't really good at explaining how she transformed. She only empathized on her anger which was the key factor for her.

"By the way why were you so enraged?" Aize threw in after hearing her talking about her anger. She unconsciously looked at Broly, who then started to answer the question for her.

"Well, I would be pissed as well." Alea squinted her eyes while glaring at Broly, who only shrugged it off. He didn't regret anything he said.

"Alright I am done for now. So, Cana can you explain how or rather why you transformed?"

Before Cana could recount what, she said to the others, Broly explained instead. He transformed as well after all. Besides being able to see lifeforce made the process of transforming clearer to him.

"Our energies flow from the center of our chest down to the ki center of our body, then up the spine and from there to the whole body. Essentially, She and I used anger to unconsciously guide our energies to the middle of the back, which triggers the S-cells and from there the energy spread through the whole body. That's why if you don't focus so much on the anger itself, you should feel a tingly feeling in the back."

"Oh yes, you already told me about those S-cells when you came to me for advices, I originally thought you imagined things but that they actually exist is fascinating. And the way you described the flow, it seems like the Super Saiyan transformation, uses emotional energy from the middle energy center above your ki center. I don't have much information about this center, but I know that it doesn't use ki but an emotional energy. Most races can't use it but if they can they get increasingly stronger. I didn't taught you this, since I don't know how to use it. There is also another energy center in the middle of your head, but I got nothing on that either."

Broly fell into deep thought.

'Emotional energy? Wouldn't that mean that we Saiyans can harvest this energy and the S-cells make use of it, additional to ki? That should explain why anger is able to increase a Saiyans strength! It is an additional energy source, of course, the Saiyan would get stronger! Wait. Can only S-cells make use of this energy?

No. If I am correct it should be something even Gohan used. In the series he had this power bursts as well even as a child before Super Saiyan, maybe it connects to his use of this energy. Wait. Doesn't that mean emotions influence the transformation and not the other way around? Then why did I go berserk?'