Ninjutsu (Ice);

Level: S-Rank (9)
Hand Seals: None
Casting Time: 1 standard action
Range: 10 ft.
Area: Touched Target
Duration: One Minute Per Cast Level
Saving Throw: None
The user, either through physical contact or remotely, causes ice particles to form on a target. If used on a living creature, the target will freeze to death unless they are able to mould chakra. By coating themselves with chakra and dedicating all their energy to keeping themselves warm, they can avoid death; if they use their chakra to perform a technique, they will start to rapidly freeze again.

On a succesful ranged touch or a touch attack the target takes 10 points of cold damage. There is no save to avoid this damage, though the character may expend one point of chakra to instead negate all damage by using their chakra to keep themselves warm. If, after expending that chakra, the target uses a jutsu or a jutsu-like ability during their turn, they will take take an extra point of cold damage per level of the jutsu used.