You've done the jutsu, now time to explain what you have done and analyze it. This is one of the most powerful Nekura jutsus and if you dont understand everything about it's use, then I am not allowing you to use it.
( Jagan ) - Evil Eye
Rank: S
Type: Offensive
Range: Short - Long
Chakra: 40
Damage: 80
One of the Nekura Clan's most secretive and fabled techniques, the Evil Eye, or Jagan, is the signature technique of the Nekura elite. To perform this technique, the Nekura member must know the method of transferring Keigoku through eye contact alone, which comes from special training with the clan head. Once the opponent locks eyes with the Nekura, Keigoku instantly transfers onto his face and eyes, causing him severe searing mental pain that causes him instant incapacitation and could cause madness on prolonged contact.
The technique may be used thrice per battle - however, per battle it can only be used once on a particular enemy. So, in a one-on-one battle, it can only be used once; in a one-on-many battle, it can be used thrice on three different opponents.
The Keigoku transfer is instant, however, the stronger the mind of the opponent, the shorter the recovery time. For MS-wielders, whose minds are strengthened by Genjutsu expertise, the time of incapacitation is thirty seconds; for normal sages, a minute, and increases by twenty seconds per rank as it descends.
The Nekura cannot use any more Keigoku techniques for two turns after.