Descent

A creature you can see in range must make a Strength saving throw. On a failure, it is abruptly pulled down towards the ground, if the creature is subject to gravity. An airborne creature or a creature in a fluid immediately descends 20 feet, and if it hits ground takes 1d6 bludgeoning damage for every 10 feet fallen. A creature on the ground takes 1d6 bludgeoning damage.

The amount of distance fallen increases by 10 feet when you reach 5th level (30 feet), 11th level (40 feet), and 17th level (50 feet). The damage a creature on the ground takes increases by 1d6 at 5th level (2d6), 11th level (3d6), and 17th level (4d6).