Thorn in My Side

Select a creature within range. Thorns appear all over their skin, causing pain to those affected. The target must make a Constitution Saving Throw. On a fail, the creature affected takes 2d8 piercing damage when you cast the spell, or half as much on a success. Until the spell ends, you can use a bonus action on each of your subsequent turns to cause this damage again.

The thorns may also be easily removed with the use of running water.

Using a Higher-Level Spell Slot. For each spell slot above 2nd, the damage is increased by 1d8 piercing damage.