Rattle

Rattle is a Kirigakure Ryū: Makengi technique.

Description
Summoning several spectral snakes behind the user, the snakes rush towards the target, passing over them and stripping them of their demonic energy and ability to regenerate. While they inflict no physical harm, this leaves the user free to attack in the opening after the assault.

Its appearance in the manga is much less dramatic. Striking towards the enemy with the back of the blade, they are seemingly pushed back with a blast of air. The full effects of this attack are never seen as Shura chooses to spare her target at the time.

Trivia

 * "Gara Gara" is Japanese for absolute emptiness, but is also the onomatopoeia for the sound of rattling, such as in the tail of a snake.