Rainbow Cannon

weapon name:Rainbow Cannon
description:A Giant Cannon Made of of mirrors with a prism inside it, those with the ability to shoot light such as Pika Pika no Mi fruit users would stick there hand inside at the end of the cannon Shooting a beam of light, this beam of light would reflect off the many mirrors inside the cannon and eventually hitting the Prism Inside Sending A Massive Beam Of Rainbow Light
weapon special abilities: optional
history:Optional

Creative, and you have explained how it works.