Vengeful Burden

You point to a creature you can see within 120 ft and curse them. The next time that creature deals any damage, it immediately takes necrotic damage equal to half the total damage it dealt. If a creature doesn't deal any damage on their turn this spell fades.  The spell can only deal a maximum of up to 30 damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage maximum increases by 10 for each spell slot abouve 3rd.