C4

A giant doll, shaped like Deidara himself. When it ruptures, a cloud of microscopic bombs is released. Impossible to be seen by normal people, the victims breathe in the bombs, which then enter the bloodstream. Once there, the countless micro-bombs explode, causing the victims' bodies to disintegrate at the cellular level, literally turning them into dust. According to Deidara, he created C4 for the sole purpose to defeat Itachi.