Sunaton (砂遁 Sand Release) combines both Wind and Earth chakra to create Sand. Initially, only Ichibi no Shukaku and its jinchuriki, Gaara, are able to use Sunaton. Although Gaara, even after losing the Spirit of the Sand, is still able to utilize the Sunaton. Another interesting fact is that in the case of Gaara, he receives a Wind Element improvement from the Ichibi no Shukaku so, Gaara's own chakra element is probably Earth.