A vivid rainbow of prismatic lights springs shoots from your hand. Each creature in a 15-foot cone must make a Constitution saving throw. On a failure, creatures are blinded and dazed until the end of your next turn. While they are dazed in this way they are unable to take reactions and their movement speed is halved. If a creature fails by 10 or more, it is additionally stunned for the duration. On a successful save, a creature is not blinded but is momentarily disoriented by the brilliant flash and has disadvantage on attack rolls until the end of your turn.
Creatures that are already blinded or cannot see you aren't effected as they do not see the burst.