Earth Spike

You touch the ground and create various spikes of earth to attack the enemy. Enemies caught inside the 15-foot-cube area must make a Dexterity saving throw. On a failed save, a target takes 6d6 piercing damage and becomes restrained. On a sucessful save, the targed takes half as much damage and is not restrained. If affected, the target can at the end of each of its turns make a Strength or Dexterity saving throw. On a success, the target is no longer restrained.

The affected ground becomes difficult terrain.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.