Harry Potter - Secrets of Hogwarts

The spell feels like a very heavy blow, sharply throwing a creature from its standing position to the ground. Choose a being you can see within range to make a Strength saving throw. On a failed save, a creature takes 1d10 bludgeoning damage, is knocked back a number of feet equal to five times your spellcasting ability modifier, and is knocked prone. On a successful save, the creature takes half as much damage, is knocked back 5 feet, and isn’t knocked prone.