Blood Hex

You place a curse on a creature that you can see within range. Until the spell ends, all attacks on the cursed creature deal an extra 1d4 necrotic damage to the target whenever you hit it with an attack. Also, choose one ability when you cast the spell. The target has disadvantage on ability checks made with the chosen ability.

A remove curse cast on the target ends this spell early.

At Higher Levels. When you cast this spell using a spell slot of 4th or 5th level the necrotic damage goes up to 1d6. When you use a spell slot of 6th or 7th level the necrotic damage goes up to 1d8. When you use a spell slot of 8th level or higher the necrotic damage goes up to 1d10.