Mark of Death

1st-level necromancy
Casting Time: 1 bonus action
Range: 90 feet
Components: V, S, M (Finger of an undead)
Duration: Concentration, up to 1 hour
Element: Darkness
You place a curse on a creature that you can see within range. Until the spell ends, you deal an extra 1d6 darkness damage to the target whenever you hit it with an attack.
A Remove Curse cast on the target ends this spell early.
At Higher Levels. When you cast this spell using a spell slot of 2nd or higher increase the damage by additional 1d6 for each level above 1st.