Curse of Brutal Falling

You attempt to render a creature horrifically vulnerable to the effects of gravity. A target creature within range must make a Constitution saving throw. On a failed save, that creature is subjugated to the following effects. 

• Takes 1d6 bludgeoning damage every time it falls prone.
• Is vulnerable to damage from falling.
• Cannot be affected by a Feather Fall spell. 

At Higher Levels. If this spell is cast using a slot of 3rd level or higher, you can target one additional creature for each slot level above 2nd.