Earthen Spikes

You cause the ground in a 30ft radius within range to crack open, revealing large earthen spikes! All creatures within the radius must make a Dexterity saving throw, suffering 5d6 piercing damage. Succeeding the saving throw causes only half damage. While concentrating, the area will remain a spiky and difficult terrain. Each creature that enters and moves 5ft within the area will suffer 1d6 piercing damage. The spikes can sprout out from walls if it is made of dirt. Once the time has passed or the concentration is broken, the spikes and earth will return to normal at the end of the current turn.

At Higher Level. Increases the initial damage by 1d6 and the radius by 5ft for each spell slot used above 3rd.