You enter into a controlled state of madness as you bellow out a maddening laughter that you share with creatures within range. Creatures of your choice that can hear you must make a Wisdom saving throw. On a failure, the targets perception of reality warps as they start to laugh uncontrollably and are incapacitated. If a creature starts its turn within 10 feet of a laughing creature they must make a Wisdom saving throw or fall into the same fit of laughter.   At the end of each of its turns, and each time it takes damage, a target can make another Wisdom saving throw. A target has advantage on the saving throw if it's triggered by damage. On a success, the spell ends.