Really now ?
Pure chakra, hmm....
Genjutsu is pure chakra.....
So...
I use
(Vi-nasuwanahara Hijutsu Genjutsu : Ranbousosshaku) - Venus Flytrap Secret Illusion Technique : Violent Bite
Rank: S
Type: Supplementary
Range: Short-Long
Chakra Cost: 40
Damage Points: N/A
An extremely complex jutsu, this technique casts a genjutsu that first makes the target think they are going to be eaten by a giant Venus Flytrap. Though this is sufficient to immobilise lower level targets, the real purpose of this technique is casting a genjutsu that plays with the target's mind by implanting a false memory of the target undergoing a violent attack by a man with split personalities in their childhood, and fools the brain into "remembering" this memory occur. This implants a deep phobia of people with split personalities into the target, making them freeze in place when they see a person with split personalities. The target, if they are a competent ninja, will release the first Venus Flytrap part of the Genjutsu, and will find that that is all ( an idea furthered by the technique's name of Violent Bite that the user will state ) and will not notice the more subtle part of this technique.
~ Can only be used once per battle
~ Lasts for 3 turns