12 Chakra Infusion

In the same spot where Ren was previously looking into the sky, you could see and hear the flashing and sparking of lightning. Ren was currently covered in sweat while attempting to infuse his chakra into his tantō. (Tantō is the little sword that members of Anbu usually have on their back)

This is much more difficult than I thought. I spent the rest of the day trying to infuse lightning chakra into this Tantō and now it's already dark. I'll go home and continue tomorrow.

...

Three days later Ren was still trying to infuse his chakra into his Tantō but had made no progress since his first attempt. Each time, the lightning cloak was created it would instantly dissipate. Because Ren was very focused, he didn't notice the pair of eyes watching him.

After his last attempt, Ren turned around to see a young man with a beard a few years older than him putting up a cigarette in his mouth. It was the son of the third Hokage, Asuma Sarutobi!

"May I ask who you are? I am Ren Uchiha." feigning ignorance on his, Ren asked.

"My name's Asuma" he replied while puffing a smoke from his cigarette then continued "Your weapon isn't suited for infusing chakra into."

While pulling out one of his signature knife blades and infused it with his wind chakra when it suddenly started making a vibrating sound.

"These blades are chakra blades, they're made out of a specific type of metal which is able to be infused with chakra. Normally, you would be able to buy a chakra weapon, but as your element is lightning you would have to have a weapon custom made for your chakra because there aren't many people who attempt to infuse lightning chakra into their weapons as it's very difficult." Asuma explained as he handed his chakra blade to Ren.

"Attempt to infuse your chakra into these, although they won't have the full of effect of your lightning element, they should be much better than your current weapon."

Doing as he says Ren tightly grips the chakra blades and imbues the blades with his chakra as a coat of lightning surrounds the blade giving him a little numbing feeling in his hand as he slices at the nearby tree.

The tree was instantly cut in half with the wood charred black at the cut. Seeing this Ren's eyes were instantly wide open.

"Lightning chakra, applied to weapons, makes your weapon vibrate at a high frequency increasing it's cutting power similar to that of wind, with the addition of inducing numbness with the electricity if you cut into the enemy's body, this can easily numb the enemy's nerves, thus slowing him and his reaction speed down."

"Thank you for everything you've done for me Asuma!" Ren said as he handed back the chakra blade.

"It's no problem, I'm glad to help you," Asuma replied with a smile then continued, you should go request for a specially made weapon that can support your lightning chakra to it's fullest extent. But,if you can't get one made, you can go ask my father for some help, tell him I sent you to him".