Karou already had enough Chakra cores, he walked through the woods looking for a safe place where he could absorb it, he would not immediately turn them into points, he would convert into Chakra increasing his own reserves and with the excess he would become in points, thus killing two birds with one stone.
Soon he found a cave in the depths of the hunting ground, entering the dark cave Karou activated his Sharingan, this made his vision much better, allowing him to see, he felt a presence in his blind spot.
He quickly raised his hands and held the being that attacked him, it was a snake, if he had not activated his sharingan he would be poisoned and die, even though the snake was just a normal animal.
- Very dangerous, I have to be careful, I'm not invincible. - Karou killed the snake and continued on his way.
Deepening inside the cave, he found a glowing underground lake, it was a beautiful lake, its water was a purple blue color, in the middle of it there was a small island not much bigger than 5 meters.
Karou found that perfect place to train, he put his foot in the water, but as soon as he put it he felt his skin burn. She quickly removed it from there, the water in the lake was in a state of boiling, but there was no water vapor. It was a very mysterious lake.
Karou found the lake very interesting, he could train another technique using this lake, a technique of walking on the surface of the water. It was necessary to concentrate the Chakra on tiptoes, it was more difficult to learn this technique than to learn the technique of walking on trees.
By learning this technique he could skip the learning of the other technique, it was not something that would increase his strength instantly, but it was an essential support skill for a ninja.
If Karou mastered this no serious challenge for him in the future, of course planning was necessary before starting this training, Karou hunted some snakes that were in the cave, the water was hot enough to cook them, so he ate quietly.
Karou created a small fire and deactivated his Sharingan, then removed his clothes and started his training, this technique also trained the control of Chakra flow, Karou discovered that this jutsu could only be used by those who opened all their Chakra points, then it could be a very useful secret weapon.
He needed to emit a constant flow of Chakra from the bottom of his foot and use the repellent force to walk on the surface of the water, it was more difficult to be mastered than the technique of walking on the tree, because the amount of Chakra needed constantly changes.
This technique could be improved in the future and the ninja can use it as a kind of board, being able to slide across the water surface. The more the ninja uses this technique, the more it becomes, reaching a moment when the ninja does not even notice the use of the technique, it is activated almost unconsciously.
Karou then started, he was on the surface and started to move the chakra to his feet, he took a step in the water, his foot did not sink, when he tried to place the other for a moment he lost his concentration and sank.
He quickly jumped out of the water, of course, Karou did not give up. He kept trying, a few days passed, he had already solved the problem of concentration, now he needed to know the exact amount of Chakra he would have to use.
This process continued, soon after a few more days, Karou finally mastered the technique, carefully he walked to the central island with the Chakra cores, Karou was happy to master another technique even though it took almost a week.
He sat on the floor with his legs crossed and started to absorb the nuclei little by little, it was a difficult and delicate process, he first filled his reserves, soon after he would overload the limit, so as not to die Karou would soon absorb this amount into the system.
This training method that Karou created was impossible for normal people and needed a good amount of Crossbow Cores, it was a method to quickly increase the Chakra limit.
Karou then started the process calmly, he took a nucleus carefully, it was the size of a finger, it was a colorless apprentice nucleus, Karou used a process that he saw only Naruto use.
The first step that Karou needed to take was to enter his mental and Chakra field, after many hours of concentration he finally entered the place, Karou's mental field was very different from Naruto.
Naruto had a damp mental field, it looked like a flooded and abandoned industrial zone, full of wires and water, it was similar to the rain village. Karou's field was green hills around a large Glade, it looked like the place where Naruto met Kushima.
Karou walked towards a hill, she should have been more than 100 meters high, when reaching the peak and looking ahead, he saw another identical set of hills with a clearing in the middle.
Looking forward in the Glade, on a hill directly in front of him there was a young man with his back, Karou was surprised and seeing another person inside, he raised his hand and shouted to get the young man's attention, but the young man did exactly the same movement with the hand.
At this moment Karou realized, he looked back to be sure, looking back he saw another young man on another hill also looking back. Then Karou was sure, this young man was himself, he tried to jump to another hill, but for some reason he was blocked, he went down the hill and went up another and had the same vision.
Karou went down the hill again, made a mark on the ground and went back up the hill, he continued to see himself, going down on the other side he saw the mark on the ground. It really was himself, this was a kind of limited dimension, where there was no beginning or end.
Karou felt confused, but decided not to think about it too much, at least his mental field was nothing strange, a flowery field between several hills was a good place. Karou then decided to start absorption.