Contagious Laughter

You tell a side-splitting joke to a creature that can hear you within range. The target must succeed on a Wisdom saving throw or contract a disease known as Ceaseless Laughter for the spell’s duration. A creature infected with this disease constantly laughs and chuckles whenever it is conscious. It cannot communicate verbally, nor produce verbal components for spells. A creature can attempt to suppress the laughter by taking a bonus action on each of its turns to make a DC 15 Constitution ability check. On a success, the creature suppresses the laughter until the start of its next turn and can communicate normally. Additionally, as an action, while the creature can communicate verbally, it can tell the joke to another willing creature within 60 feet that can hear it. Doing so transfers the disease to the recipient of the joke, which continues until its duration ends, and the effect on the original target ends.