This genjutsu requires the Sharingan and eye contact to be activated. The target is caught in a mind world created by the user, where an endless rain of acid pours. This jutsu seems to manipulate time in the opponent's mind to an extent, and the acid that hits their skin in the Genjutsu causes very real pain. The rain falls fast and hits like needles, melting the skin off the user. However, the victim is unaffected in the real world, though the pain the victim felt doubles when the Genjutsu ends.