Heavenly Weeping

The Heavenly Weeping is a ninjutsu used by Tobirama Senju.

Usage
A technique in which chakra is kneaded in the user's body, transformed into water and then shaped into senbon in the mouth before finally being expelled at a high velocity. The needles are shot in an attempt to catch the enemy off guard, while also aiming at their vitals.

Trivia

 * is the Japanese term for rain that falls from a cloudless sky.
 * In the anime, the needles appear to be nothing more than regular senbon.