Tasha's last laugh

You release Tasha's greatest joke. Any other creature  then you within 20 feet radius of a point you choose must make a wisdom saving throw or be affected by the spell. On a failed saving throw a creature drops everything it holds, falls to the ground, starts laughing uncontrollably and is incapacitated. At the start of each turn a creature takes 2d8 psychic damage for the spell's duration. At the end of each turn affected creature must make a wisdom saving throw, on a success, the spell ends.