Earthen Spike

A place your hand to the ground, and erupt a large stalag-mite beneath a creature within range. The creature must make a Dexterity saving throw. On a failed save, the target takes 6d8 bludgeoning damage and is knocked 20 feet into the air as a 5-foot in diameter and 20 feet high spike rises beneath it. On a successful saving throw, the target takes half damage.

Each creature within 5 feet of the chosen target must also make a Dexterity saving throw. On a failed save, the target takes half damage, and no damage on a success.

The creature is then pushed back 5 feet. The stalag-mite remains until your concentration is broken, at which point it crumbles, making its area difficult terrain.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.