Prism Rain (レインボウシャワー Reinbou Shawā, lit. "Rainbow Shower") is a technique that appears in Kingdom Hearts Birth by Sleep and Kingdom Hearts 0.2 Birth by Sleep -A Fragmentary Passage-. The attack consists of firing a salvo of rainbow-colored orbs at the targets.
Mechanics
In Kingdom Hearts Birth by Sleep, Prism Rain is a Shotlock that has a maximum level of 5 and max lock of 16. After the initial volley, the player can perform extra attacks by pressing 
in a timely manner to fire additional projectiles, based on the player's timing rating.
In Kingdom Hearts 0.2 Birth by Sleep -A Fragmentary Passage-, Prism Rain is a Shotlock that has a max lock of 28. After the initial volley, the player can fire additional orbs by pressing in accordance to an on-screen display, based on the player's timing rating.
Learning Prism Rain
Kingdom Hearts Birth by Sleep
- Aqua obtains Prism Rain from a chest in the Ship Hub.
Kingdom Hearts 0.2 Birth by Sleep -A Fragmentary Passage-
- Aqua begins with Prism Rain as her default Shotlock.
Etymology
A prism is a small glass that is used to refract light into its seven component colors. The component colors of light match the colors of the projectiles launched during the execution of Prism Rain.