Icy thorns burst from the ground in a 10-foot-square within range. For the duration, these thorns turn the ground into difficult terrain. They disappear when the spell ends shattering into motes of blue light. 

Each creature (other than you) in the effected area takes 1d8 piercing and 2d6 cold damage. Creatures must succeed a strength saving throw against your spell save DC. On a failed save, the creature is restrained until the spell ends. A restrained creature, at the start of their turn, can take an action to repeat the save. Otherwise, the target takes an additional 1d6 cold damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the cold damage increases by 1d6 for each slot level above 1st.