Daily Punch 4-3-18 Fist of the Earth spell for DnD 5e

Let’s keep moving with more DnD spells.  Here is one for the Druids out there.

Fist of the Earth

3rd-level conjuration

Casting Time: 1 action
Range: 60 feet
Components: V, S
Duration: instantaneous

You punch the earth with a warcry and the earth punches up to three targets in range that is on the ground or within five feet of the ground.  Each target must make a Dexterity saving throw.  On a failure the target takes 10d6 magic bludgeoning damage as a shaft of earth springs forth and rams into the target.  The target also is thrown and lands prone.  The distance the target is thrown depends on the size of the target.  If the target succeeds in its saving throw, it takes half damage and is not thrown.

At Higher Levels: When you cast this spell using a spell slot of 4th level or higher, the damage increases by 2d6 for each slot level above 3rd.

Thoughts?