Breathless Whisper

You blow a kiss in the direction of a creature within range.  The target must succeed on a Wisdom saving throw or fall prone as the air is sucked out of it’s lungs.  The target becomes incapacitated and unable to stand up for the duration of the spell as it struggles to breathe. A creature with an Intelligence score of 4 or less isn't affected.

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.