Kei was talking about "Sage Mode" from Narutoverse when he was talking about Nature's Ki and he wants to achieve that level
As for the one, the power that is strong enough to destroy the whole worlds, it was somewhat related to the "Shattered Heaven" or "Tengai Shinsei" (still not get it? Madara pulling down meteor skill) but that's not the ultimate one, there is more.
No doubt, this skill has its own rules that need to be implemented and then only the Skill can be cast but…
If Kei was in any other anime world, then he would not think much about implanting skills of other anime worlds, but he is in a world where there is a race that can adapt to just anything
Their body can overcome their own limits and grow much more, thus… being a Saiyan is no small thing, especially considering the amount of Ki one could hold in themselves.
For sure, this meteor skill can be destroyed by someone who has the power to obliterate a planet, but still… it would be more than enough to let the enemies know that they can never go up against him (Kei)
and this is just a small relation, the main goal is further away from it
. . .
Kie is already fed up with his defeats, it took him a long time to finally enter the ring in his past life and overcome his fear of others and then become a legend
He knows that being looked down on by others is the worst thing one could ever face and it forces you to do things that you don't want to just to survive that one day or that one very moment of shame
Kei has passed those days and stepped into glory, but he has never forgotten those days, and neither he wants to go back to live that life.
It was a busy life, thus when Kei got the change of his dream and lived a new life in this world
He wants to take things slow, enjoy the scenery, fight others just like in the anime and spend his life like that, and because he is the 2nd main character, his death won't come so easily.
BUT
1st defeat against Goku and others made him unhappy but it was okay
2nd defeat against Frieza, when he clearly overpowered him? That irritated him and he even died at that time
3rd defeat against the androids made him really angry because he had the power and Androids were not supposed to gang like that, it rarely ever happened but it happened against him.
And then finally, 4th defeat against Cell
That just made the scars of his past (childhood) all fresh and Kei is unhappy about it.
And then, Vegeta's vulgar tone and personality kept on scarping those scars which made him remember those eyes that looked down on him when he was forced to do things that he didn't want to.
And so, he snaps at Vegeta.
Vegeta didn't say anything, he quietly left Kei alone.
"I don't know if there is anything like Nature's ki or not… but even if there isn't, I will still achieve my goals
I won't allow anyone to look down on me."
*time passes*
Trunks enter the time chamber again and increase his power, now only one day is left for the cell game
The moment he came out, he notices his father is still not there and this is making him worry, so he asks Goku if he has seen his father but he got no lead
Trunks thought that his father has most likely gone after Cell, but then he removed this thought right away because he would feel the Ki of his father and Cell if they were to fight.
And no matter how hard Goku or anyone tries, no one is able to sense Vegeta's Ki
Trunks get really worried about this and now that the Cell game is tomorrow, he leaves to find his father.
Right now, Trunk is flying above a forest as he looks at the ground for his father but he is not seeing him anywhere.
'Just where is Father?
The final battle is about to begin, but he is nowhere to be seen.
Just, where is he?'
Trunks is really angry at his father's attitude towards the whole issue and also how Vegeta cares less about his own family.
He is angry but still he wants to know where his father is and what is his condition.
Trunks pass by a big waterfall but pays no attention to it and keeps on flying forward
*!!!!*
Suddenly he senses a faint Ki, which belongs to his father, from the waterfall region and he stops immediately, he turns around and goes straight at the waterfall and then he looks around the forest in hope that he could finally meet him
And he did meet him
"Father?"
Trunks saw his father washing his face with a water stream, coming from the waterfall, he lands near his father and was about to ask something when he suddenly stops
"????
Uhhuuhu…."
Trunks can't believe in himself, in the sense that is telling him to stop his step and tremble in fear, as the man that stands in front of him is way more powerful than he saw him few days ago.
Trunks have a base power of 50 million right now, he is stronger than he was a few days ago and even when he met Goku and others, then also he didn't have this type of feeling.
Trunks knew that his father had surpassed Goku when he fought against Cell but somehow Cell managed to win, but right now… in this very state of his father…. he is confused now about Goku fighting Cell when his father holds the power to just crush Cell in a second.
"What happened?
Did you bite your tongue?"
"No… nothing, it's just… you feel different"
"Different?"
"Gulp… I mean, strong"
"hahahahaa
Strong huh…. There is a long way to go brat, don't think that this is it for me"
"No, I didn't mean in that way"
"Stop your mouth and just follow me, let's see how the Cell Game will go."
"um… father, just how strong have you become?
"What kind of stupid question is this?
But if I have to answer you, I don't know as I still need time to test my full power but one thing is clear…"
"What?"
"Even if Kakarot and his friends combined their strength with those Android and Cell, and also even you join his side… then also, you can't defeat me
That much, I am sure"
"??????????"
. . .
To be continued-
just how much did this guy become strong?