Scourge's Mantle

3rd-level necromancy
Casting time: 1 action
Range: Self
Target: Any hostile creature within the spells radius
Components: S
Duration: Concentration, up to 1 minute
Classes: Accursed
Subclasses: Sorcerer (Cursed Existence)

Curse magicks cascade off you to create a malignant aura with a 30-foot radius, weakening your enemies within it. Until the spell ends, the aura moves with you, centered on you. Whenever a creature hostile to you within the aura deals damage, it must roll a d4 and subtract the number rolled from the amount of damage it dealt.