Akuma no ha

Akuma no ha is a sword forged by Aoi Kenju to better control his Kekkei Genkai, Blue Flame Release. Akuma no ha, or, Devil's Blade, is suspected to have a demon sealed inside due to the devilish, purple chakra it produces when the user is enraged.

Abilities
Similar to the weapons used by the Seven Ninja Swordsmen of the Mist, the sword possesses a unique power, this being its ability to reform itself using the blood collected from its victims. This regenerative process takes place almost instantly and is capable of bringing the weapon back to its original condition no matter how severe the damage is, from a simple chip or nick to a complete separation of over half the blade. The sword also possesses high durability and is quite strong, able to cut through almost anything.

Channeling
Akuma no ha has various channeling abilities. These abilities increase the blade's physical capabilities and other, more chakra-related abilities too.

Negative Emotion Channeling
The Akuma no ha has the unique ability to channel the user's negative emotions automatically. These emotions take the form as bubbling, purple chakra wrapped loosely around the sword. This chakra can be used as a secondary chakra source for the user, making it very useful in combat. The only downside to this being the user is usually blinded by anger or bummed out.

Blue Flame Release Channeling
This blade is able to freely channel Blue Flame Release, and be able to be lighted easily. The sword is flame-proof and has a unique affinity for Blue Flames. Every slash taken while the blade is lit by Blue Flame Release leaves flame particles behind, burning the target even more after use. The flame particles left behind can be freely manipulated using Blue Flame Release, making it viable as a projectile.