Spiral Blade

The Rasenken is a variant of the Rasengan which covers the user's blade in a thin layer of chakra spinning in multiple directions.

Overview
This variation of the rasengan was made when Buji's master waskilled before he could teach him the final step of the rasengan. So he instead used his mastery of Kenjustu to coat his blade in a Rasengan based layer chakra. This took him five years to refine the technique. This resulted in the creation of the Rasenken. Like its parent jutsu and its variations the Rasenken does not require any hand seals. However unlike the Rasengan this technique requires the user to constantly add chakra to sustain it.

Buji makes the bold claim that this move is superior to the Rasengan, as it shreds any matter it comes into contact with because of the endless amounts of chakra spiraling in different directions in a concentrated thin layer. Resulting in a powerful shredding force

Learning
The Rasenken requires the user to have learned the first two steps of steps. The final step of the Rasenken utilises the basic Kenjutsu skill of applying chakra to the weilders blade. Then uses the the first two steps of the Rasengan. Then finally keeping a constant flow of chakra to thin out the spirals into a thin layer as the technique does not utilize the containment step. The completion of this technique is far more difficult than learning the Rasengan. As this technique requires a large amount of concentration, large amounts chakra reserves and control.

Usage
The technique requires the user to utilize all the steps and create a thin layer of spiralling chakra around the blade. When the technique makes contact with the enemy the Rasenken will shred any body parts it makes contact with and will send him or her hurling through the air.