The Crystal Style is a rare and advanced chakra nature that can create crystal as well as manipulate already-existing crystals and crystalline structures.
Crystal Release can crystallise any substance, thus, earth, water, and wood style jutsu are useless against it. Using crystal ninjutsu, the user can crystallise any physical material and even the moisture in the air around them, turning them into a weapon. In the case of human targets, Crystal Release can solidify its targets down to the cellular level, imprisoning and even killing the victim should the crystal ever be struck, reducing the mass of crystal and the victim down to crystalline dust.
Advantages and Weakness
The Crystal Style, though powerful, has two known weaknesses, the first being that it cannot crystallise either raw energy or chakra as they have no physical mass to crystallise, allowing a person with either energy-based jutsu, such lightning, fire, wind, or good chakra control to properly counter it. The second weakness of Crystal Style is that it is susceptible to a specific sound wave frequency; because crystal requires a very precise build-up of molecules, the proper sound waves can break down the build-up before the crystal can properly form. Rinji, taking advantage of this weakness, used his bats to counter Guren's Crystal Release.