Dark Flame Control!

Skill Name:Darkness Control
Rank: D
Bonuses: List the bonuses achieved for each rank
of the skill D-S.
D.D ranks have all their elements that they cast a jutsus turn a hint of black.To rank this up do a 200 word sample of how you mastered this stage.
C.C Ranks have a bit of a peed boost and can use the dragon tattoo as a curse sealing a users arm, the user who is cursed has to do a simple 500 word post of how he/she over came this curse or used a jutsu to remove it.To Step up do a 300 word post of how you mastered this stage.
B.B Rank is vastly stronger, the user has all the other things, but he when using a curse makes the word count 600 words, the user can use this on both the enemies arms BUT he will have to do a 600 word post to do such a thing.To rank up on this you need to complete a 700 word count mastering this.

A.A rank ninjas with this skill, they have all the ablilities as before, but they can use them on bijuus, when using them on bijuus they don't need a required word count, and the user can use this up to 4 times on the bijuu.Although the user can't curse another character with this curse.To rank up from this, you need to complete a 1,000 word count to rank up to god tier Jk to S rank version.


S.S Rank is basically screw you i am op, he is able to curse up to 9 times on a bijuu, completely null out any word count he needed to do if he used a Darkness flame jutsu, when he uses this on the bijuu, the bijuu is weakened to halve his power making him weak,


Description:

First, you must be taught by kankri to use the Darkness Flame Dragon.Secondly, Kankri must teach you the Darkness seal technique.The Person trying to obtain the skill must use and fight against the dragon or plainly run away from the dragon.At the end of the thread you must meet the 1000 word requirement, as well as use the sealing jutsu to seal the dragon inside you.

After the user seals the dragon inside them. The rank their ninja is is their default rank.The dragon and the seal fused inside the body making a powerful fire symbol that is black as it's curse.The curse is a sort of restraint that stops most resistance.The user can harvest this skill so long as they meet the required word count.
Requirements: GET PERMISSION FROM KANKRI! AND HAVE FIRE ELEMENTS!

I have no problem with this! Unless someone says something, approved.