Tasha's Thunderous Laughter

A wave of laughter sweeps out from you. Each creature in a 15-foot cube originating from you must make a Wisdom saving throw. On a failed save, a creature takes 2d8 psychic damage and falls prone, becoming incapacitated and unable to stand up for the duration. On a successful save, the creature takes half as much damage and doesn't fall prone. 

At the end of each of its turns, and each time it takes damage, the target can make another Wisdom saving throw. The target has advantage on the saving throw if it's triggered by damage. On a success, the spell ends for that creature.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.