Crystal Release

The are techniques that manipulate crystal. Using Crystal Release, the user can induce a process which will crystallize anything around them--like bodies of water, moisture in the air, even bodily fluids--turning them into a weapon or solidify targets down to a cellular level imprisoning and even killing a victim should the crystal ever be struck.

The only apparent weakness of the Crystal Release is that it cannot crystallize raw chakra, allowing a person with enough chakra control to resist being inwardly crystallized. Furthermore, Lightning and Fire techniques also appear to be rather effective against the Crystal Release.

In ep# 91; Orochimaru's Hideout Discovered, when a recon team, lead by Kakashi, first encountered the victims of Crystal Release, they pondered that such a type of jutsu, that crystalizes its targets, might be a earth-related ability.

It's only known user is a woman called Guren. This element appears to regularly use a Ram hand seal.