Throne of Thorns

You conjure a bed of thorns that wrap around a creature keeping them held in place. Choose a creature you can see within range. The target must succeed on a Strength saving throw. on a failed throw they are Restrained for the duration and take 4d4 piercing damage. On a successful save, the target takes half of that damage and the spell ends.

At the start of the targets turn it take another 4d4 piercing damage. A creature can use its action to attempt Strength check to free itself or another creature from the bindings, ending the spell.

Using a Higher-Level Spell Slot. The damage increases by 2d4 for each spell slot level above 2.