Prism Rain

Prisim Rain is a Shotlock that is exclusive to Aqua in Kingdom Hearts Birth by Sleep. This shotlock is similar to Ragnarok, but instead of beams of light, it shoots out Rainbow colored Beams.

Etymology
A Prism is a small glass that is used in Science to reflect light at an angle until it's to the point where the light splits up into 7 different colors.

Location
Prism Rain is located in a chest in the Ship Hub in Deep Space.