Briars of Punishment

You wound yourself with thorns of punishment, sending a line of bloodthorns 60 feet long and 5 feet wide across the ground out from you in a direction you choose. You take 1d8 piercing damage, and every creature in the line must make a Dexterity saving throw. A creature takes 4d8 piercing damage on a failed save, or half as much on a successful one.
At Higher Levels.
When you cast this spell using a spell slot of 2nd level or higher, the damage dealt by the line increases by 1d8 for each slot level above 1st.