Aerosion

The caster slowly wears down the target with constant sharp air currents. On a successful melee attack the caster can use their reaction to cast the spell, dealing an extra 1d4 slashing damage for the initial attack. While under the effects of Aerosion, each time the target is hit by a melee attack they take an additional 1d4 slashing damage from the spell.

Aerosion can be removed with spells such as remove curse, or the lesser restoration spell.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the additional damage increases by 1d4 for each slot above 1st.