A forest of stone spears rises up from the ground in a 30-foot radius around a point you designate within range. Creatures in the area take 5d8 piercing damage and are restrained. A successful Dexterity saving throw reduces the damage by half and negates the restrained condition.   A creature that starts its turn in the area and is already restrained by the spears takes an extra 2d8 damage from the pain of being held aloft as well as bleeding from its wounds. A creature restrained by the spears can use its action to make a Strength or Dexterity check (its choice) against your spell save DC. On a successful save, it frees itself. For the duration of the spell, the area is difficult terrain. The spears (AC 14) can be damaged; they are immune to piercing damage and have resistance to bludgeoning and slashing damage from nonmagical attacks. If a 5-foot-square section of spears takes 15 damage, that’s enough to free a restrained creature or clear the section of spears.