Hmmmm ... I see. So in a way, you want to create a DF that creates a pseudo-Byakuga effect. It sounds quite overpowered, to say the least, however. If you wish to use it in conjunction with a sword, then .. I don't know, what about the example suggestion Ima offer below?
Kahen Kahen no Mi (Petal)
Type: Paramecia
Powers: Kahen Kahen no Mi allows the user to become a "Petal-man". User is capable of generating petals by using his open palms. These petals can have various appearances, reminiscent of the many types of flowers that exists in the world. On a more offensive approach, the user is also able to generate a special form of petal that can be used offensively, due to it's sharpness. The user can also transfer the powers into a sword, making it so that when he swings a sword, a blast of petals is generated, that can be used as a means of long-range attacks. The user can also manipulate the petal's path by using his arms, making them move according to his own arms movements. The petals disperse after a short while. (Limit: 3 posts)
Weaknesses: Fire is capable of easily burning away the petals, even the special razor-sharp variants that the user is able to generate. Also, while there is a control of the user over them, strong wind is able to make them fly away (unless if used in a slashing move, example being the sword combination with this power). While the razor-sharp petals can easily cut through flesh and wood material, they can not damage metal much more than leave slashing traces, also it requires an extensive amount of them to cut through thick rock or bones.
Just a suggestion, you can either use it or make your own adjusts, I just think that my example above is balanced enough to be approved.