Tremble Footing

You cause the ground beneath a target within range unrest, trembling and molding the surface. The target creature must be on a solid surface. The target must succeed a Dexterity saving throw or take 1d4 bludgeoning damage and be knocked prone.

This spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).