Deafening Cards

You start shuffling a deck of cards and all who hear except the caster make a constitution saving throw. on an unsuccessful roll the target(s) fall unconscious, and take 2d6 thunder damage. On a successful save, the target(s) are deafened and take 1d6 thunder damage. If a target(s) has a constitution score of 14 or higher that creature can make a constitution saving throw on every following turn that it is unconscious. On a successful save, the creature is no longer affected by the spell.