Naruto looked around and sighed.
Naruto: "Blue?" He called out. "Blue you there?" There wasn't a single response. Not only that, there wasn't even a single type of sound. It was just silent. Gamer's Mind kept Naruto calm as he kept looking around. Eventually, he heard footsteps from behind him. When he turned around, he saw Blue but Yamato was on his right hand while his sheathe on his left. Instinctively Naruto knew what Blue wanted so he pulled out his own Yamato.
Blue nodded and got in battle position. Naruto did the same thing as the Dark Slayer Style simply took over him when he held the Yamato. Currently, Naruto can't use the abilities of the Yamato due to his minuscule amount of Demonic Energy so he could only use the sword as his only weapon while Blue had his full skillset and powers available. To make it worse, Naruto can't feel chakra in him anymore. No matter what he did, Chakra simply did not exist inside him but he found out that his Mind Power did.
Knowing this made him feel worse as he realized that he can't even use it yet. Only when he saw Blue running towards him did he get out of his mind completely and focused on what's in front of him. When Blue got close, he vanished when Naruto blinked. Battle Instinct kicked in and his hand that was holding Yamato automatically moved behind him to block the incoming attack. Because the skill was not maxed out, it wasn't an effective block as Naruto got sent flying.
Quickly spinning in the air to balance himself, he landed on the floor roughly. Once he was there, Battle Instinct told him that two sword slashes were coming from both sides and so Naruto did a split and quickly looked up. He saw two of the Blue's clones missing and accidentally clashing with each other. He didn't have time to process this as he saw the real Blue swing the sword down on to him from the air.
Naruto could sense the tremendous amount of force coming from Blue's Yamato as it was falling on him but he didn't have time to admire him. Naruto immediately dove straight by using his hands to push from the ground and Blue hit where Naruto originally was which sent a wave of air to Naruto that made him tumble on the ground. Swiftly getting up, he saw Blue use the Yamato to cut through the smoke and looked directly at me.
Blue: "Good. You made some progress I see but it's still not enough. You need to become better." said Blue. "While I was fighting you, I felt like there was something inside your body that you could have used to fight me but you didn't. Why?"
Naruto: "Oh. That." He scratched his head. "The thing is, I don't know how to utilize it right now."
Blue: "...learn it."
Naruto: "Huh?" He thought he heard wrong.
Blue: "I'm giving you ten minutes to learn it or I will use 40% of my power." Naruto's eyes almost bulged out.
Naruto: "40 only? What were you using before?" he was curious.
Blue: "10%. Now begin." he said as he sat down and closed his eyes.
Naruto: 'Oh crap. Gotta hurry.' He panicked a little until he became calm once more. 'Let's see. Mind Power. Mind Power. So far, only the Nara clan jutsus triggered Mind Power so does that mean that it's the key? Hmm...' Naruto kept thinking about possible solutions. 'What if I use Mind Power to use the Nara clan jutsus? Mind Power could be a sort of replacement for Chakra although I'm not sure it will work.' Looking around him, Naruto realized that it was nothing but dark so he thought maybe it might work. 'Yin element is about giving form and since Mind Power is similar to the Yin Element, it might just work. Let's try it.'
Two minutes later, Naruto jumped in joy. The experiment was successful. Not only that, he even managed to make some jutsus that were either an upgrade made from the original jutsus or new ones that he created because he could. Best part of the whole thing was that seals were completely unnecessary. Taking the rest of the time to increase the levels of each skill, he managed to get them all to an acceptable level. Blue then opened his eyes and got up.
Blue: "Seems you were successful."
Naruto: "Yeah. I am."
Blue: "Ready?"
Naruto: "As ready as I can be." Blue nodded and immediately swords formed around him. They shot out at Naruto at great speeds but Speed Sight allowed him to see what was coming at him. This slow-motion view reminded him of something and it wasn't until he saw the color of Blue's clothing did he remember. Lightning started to shine in his eyes and his body started to visibly show lightning coming out of him.
Naruto felt a surging power that he never experienced go through his body. He thought he would just activate his lightning to get the speed boost but he felt something stronger envelop him. His hair even had a light blue outline to it and Naruto felt confident that he could match Blue even if it is for a minute or two. Blue, on the other hand, felt a little excited. Never did he think his new student is so capable.
They both rushed to each other except Naruto had the upper hand this time. When Naruto slashed at Blue sideways with enhanced speed, black chains with a sharp blade at the end of it came out and attacked Blue at the same time. Blue had no choice but to unleash a bit more power to avoid an injury from the assault. Jumping in the air, Blue saw that the chains were following him and he used Yamato to cut through all of them. Tens, hundreds, and thousands of chains came out of the ground to attack Blue but all of them were cut to pieces.
When Blue looked at Naruto, he saw a smile on Naruto's face which made him immediately raise his defense but it was too late. Every broken chain shot out spikes from mid-air and it also came from the ground and sky. Naruto thought that there was no way he could get out of this unscathed so he let his guard down and put away his lightning powers. A second after he disabled his lightning, a dark blue shadow appeared behind Naruto.
Unfortunately, his battle instincts couldn't save him from the attack he obtained from the back but the best part of it was that it was a kick instead of a slash. From the hard kick, Naruto rolled somewhat far and only stopped when the momentum of the force was gone. He rubbed his back and muttered bitterly about losing as he thought about the fact Blue might've broken his spine if he was kicked in reality.
Blue: "Good job. Tomorrow I'll teach you something as you managed to get one over me." Blue released his devil trigger state and then disappeared. Naruto wanted to get a good look at Blue's devil trigger but he missed it by mere moments.
Naruto: "Welp. At least I'm getting something out of it." He shrugged and laid down.
[Nice job.]
Naruto: "Thanks, Cain. I only wish I had a devil trigger of my own right now. That cool voice and an awesome look would be great to have. Not to mention the abnormal boost in everything." he sighed again as he the place where he got kicked throbbed a little.
[Soon you will have it so until then, don't worry about it.]
Naruto: "You're right. I shouldn't worry." he said as he started to feel drowsy. "Cain, make sure that you don't give me notifications until tomorrow is done okay?"
[Any particular reason?]
Naruto: "Not really. I don't want to be distracted when I learn the Yamanaka jutsus."
[Do you have a plan?]
Naruto: "Nope."
I had a hard time picking between a vision and battle so I did the battle for more progress as I'm pretty sure everyone has been getting sick of the slice of life stuff.