Fujin analyzed, 'It's almost like an entirely new jutsu. Though it can't maintain its form for more than 12 meters, that's not an issue. After all, I only need it to give a boost to the Vacuum Bullet.'

Fujin pointed at the same tree again. A Vacuum Bullet started forming in front of his index finger. As soon as it was formed, a stream of wind was released from his finger and the Vacuum Bullet was fired.

Due to the force from the wind stream, the speed of the Vacuum Bullet was much faster than what Fujin was capable of earlier. However, its aim was a bit off. Instead of hitting the center of the tree, it grazed past it.

Fujin analyzed, 'Hmm, aiming became difficult. The Vacuum Bullet has to be right in the center of the wind stream. If it is even a few micrometers away, my target will be off.

Though this isn't entirely bad. Once I master this, I can use this to control the direction of my Vacuum Bullet. I can be pointing at one ninja and shooting another.

More importantly, the speed is considerably more than the speed of my Air Bullet. Though it's still slower than the Vacuum Bullet I shoot from my mouth.

But, with practice and as I become more efficient in this technique, I should reach a similar speed. In fact, it is likely that I could even reach faster speeds. Even if it doesn't and is slightly slower, it will still be sufficient to fulfil my needs.

Though there are still a few more improvements that I need to make, I have overlooked one important fact'

Fujin fell into a thought. He deeply analyzed and concluded, 'Though I have modified the Assassin's Rush jutsu to create this, it is more like a completely different jutsu. While I am only concerned about the boost it provides, it also has the potential to become a jutsu on its own'

Fujin pointed at another tree. This time, instead of releasing the wind stream instantly, Fujin concentrated a large amount of Wind chakra on his index finger. Once the chakra reached the required level, Fujin released a highly concentrated beam of wind from the tip of his index finger.

This time, the beam maintained its form and travelled like a laser until it hit the tree. On impact, it immediately created a tiny 1 cm hole in the tree. However, since Fujin was continuously releasing the stream, the hole was bombarded even more by the attack. Its depth continued to increase. In addition, the sharp winds also increased the size of the hole by hitting and eroding its walls.

After around 15 seconds, Fujin couldn't continue supercharging the attack and finally stopped. His attack immediately lost effect and dispersed after increasing the hole's size a bit more.

Fujin appeared in front of the tree and observed the hole. A smile formed on his face as he saw, 'The hole is around 20 cm deep. If I had continued for a few seconds more, it would have pierced through this tree.

I was right. This attack can become a deadly one as well. When providing a boost to the Vacuum Bullet, I didn't pour much chakra into it. And whatever I poured was used to provide more momentum.

But this time, I supercharged it with Wind Chakra. Its principle is similar to the Wind Breath of my summons. Though it doesn't have the same penetrative power or speed as Vacuum Bullets, it does have its own advantage.'

Fujin once again extended his index finger and began concentrating his chakra on it. A few seconds later, he released another stream of extremely sharp winds. This time, he targeted a rock.

The wind stream hit the rock and created a few scratches on the surface. However, instead of focusing on one spot, Fujin moved his finger towards his right. As a result, the wind stream also moved towards his right.

Fujin kept moving his finger and observed as the wind followed. He began moving it in a circular motion causing a spiral-shaped Wind Stream to be released.

He stopped and thought, 'Yes. This can be a good option in some situations. Though the speed is slower, I can release it continuously and keep targeting the enemy. Though harming a strong ninja with this is unlikely, I could use this to draw them towards a trap. So this will work great with Fuinjutsu traps.

Another possible way of using this will be by spamming it with shadow clones. A dozen Shadow Clones using this jutsu at the same time will make any enemy's skin crawl. And while defensive jutsus like Earth Wall and Iron Skin jutsu can stop it, I can just shoot Vacuum bullets through this wind laser to break any defenses. In fact, the wind laser might make it difficult for enemies to spot the Vacuum Bullet.'

Fujin was very satisfied with the result. He was even more pleased as he basically learnt that jutsu for free without having to spend additional time to learn it to wreck his brain for several days to come up with it. After all, creating that jutsu wasn't what he initially intended and he had developed it just for support.

He thought, 'Since it is almost an entirely new jutsu, I will need another name for the jutsu. What should I keep?'

Fujin thought for a few seconds before deciding, 'I will go with Wind Laser jutsu. Seems appropriate. But I will need to increase its power a lot to live up to that name.

Regardless, I will work on this later to raise it to a level that can be used in combat. Right now, I still need to improve my control over this. For one, I need more speed. And more importantly, I have to be able to use 10 Wind Lasers at the same time to give a boost to 10 Vacuum Bullets.

That will need some practice to perform this jutsu correctly and consistently. In addition, I also need to improve my aim and work on controlling it such that I don't necessarily have to fire straight.

I will eat the soldier pill tomorrow. Hopefully, 5 days will be enough to bring this jutsu to a level good enough to be used on a battlefield. When I take the 3rd pill, I should do both, master this jutsu and learn the Four Symbols Seal.'

Since it was already dusk and his chakra reserves were low, Fujin decided to stop training and he returned to his home.

The next day, Fujin consumed the soldier pill once again. Just like a couple of weeks earlier, Fujin created 80 Shadow Clones, who continued studying the Four Symbols Seal, while Fujin went to the Anbu Training Facilities. En route, he thought, 'The Wind Crystals barely have any effect on me anymore. There is no point in meditating there unless I can somehow increase my absorption speed by several times and compensate quality with quantity.'

Fujin thought of ways to do that until he reached the training facility. Unfortunately, he couldn't come up with anything once again. He sighed and decided, 'Leave it. I'll visit other training rooms. A shame that I couldn't live up to the grand expectations of the benevolent Lord Third Hokage.'

Fujin entered one of the Fire Training rooms and meditated for a couple of hours to recover his chakra. After recovering his chakra, Fujin returned to the training ground. Fujin decided to focus on two things. The first was shooting Vacuum Bullets from his finger and propelling them forward using the Wind Laser jutsu.

The second was shooting 10 Wind Lasers simultaneously from the tip of his fingers. Of course, in both aspects, the Wind Laser wasn't the supercharged one that could do damage. Instead, it was harmless and just increased the Vacuum Bullet's speed by providing it additional momentum.

Fujin created a dozen clones and alternated his training between those two aspects. Unfortunately, the two aspects didn't require as little chakra as it did to try and master just one Wind Laser.

Using ten Wind Lasers at the same time needed ten times more chakra. While shooting a Vacuum Bullet needed more chakra than even the ten Wind Lasers. So Fujin needed to take a meditation break several times to recover his chakra.

Despite that, the progress was rather quick. After experimenting just for a day, Fujin got a feel of the Vacuum Bullet combined with the Wind Laser. He could position the Vacuum Bullet in the dead center of the laser about 70% of the time he tried. On the next day, the accuracy reached 100%! Fujin stopped training this and instead divided the training time into two more aspects.

The first was the speed aspect. He tried to increase the power of the Wind Laser so that it would grant more speed to the Vacuum Bullet. The second aspect was positioning the Vacuum Bullet just slightly off the center so that Fujin could aim the Vacuum Bullet in a direction where his finger wasn't pointing. Both were considerably more difficult to achieve as compared to merely placing the Vacuum Bullet at the center of the laser.