The Scissor Blades (はさみの刃, katatachi basami) are a set of weapons created by a legendary blacksmith during the early days of shinobi. Before ninjutsu was commonplace, swords and other bladed weapons were the tool of choice on the battlefield. Blacksmiths from far and wide set out to create more and more advanced types of weaponry that could overpower the regular swords that were so popular, and that is how these special blades were born. Originally created as a single weapon, the Scissor Blades were intended to be used as a kind of kenjutsu-counter. Since the scissors were made of such a rare combination of metals, they were able to literally slice most standard issue swords in two with a single snip. However, after the blacksmith was killed the scissors mysteriously separated and were lost.
After years of searching one [character in the making] found one half of the scissors. It was worn and falling apart, but when they touched it something strange happened. Their ability to manipulate their blood transferred into the scissor blade and gave it a lease of life. The scissor literally began to drink their blood until it regenerated completely, being returned to it's former glory, only with a different set of abilities. Now feeding off of the blood of the user, the scissor blade has taken a new name: Red (赤, aka) is the new and improved form of the once legendary weapon. With its new found abilities, Red utilizes the blood of its user to change it's form and unleash horrifically gruesome attacks upon its enemies. It's primary means of attack (other than cutting) is firing condensed mixtures of chakra and blood in an arcing motion that is almost impossible to dodge due to the nature of its shape. As a result of it's ever changing form, Red can extend and shrink at the users command, growing to the size of a spear and shrinking to the size of a regular scissor blade.
The second of the blades, known as Purple (紫の, murasakino) was later found by the very same [character in the making] and it took on an entirely different property upon it's revival. Rather than being able to change form, Purple is able to release a disgustingly thick and potent poison that slows the nervous system and brings near instant fatigue among those unlucky enough to be struck with it. Both sides of the scissors are incredibly sharp and easy to use. Their large circular grips allow for quick and easy movement and can be swung around as if they weighed nothing.