Cause Wounds

Make a melee spell attack against a creature you can reach. On a hit, the target takes 1d8+spell modifier  necrotic damage and the spell is discharged.
On a miss the spell is not discharged and you may attempt to his again so long as you maintain concentration 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.