Aura of Impurity

Enervating energy radiates from you in an aura with a 30-foot radius. Until the spell ends, the aura moves with you, centred on you. Each creature of your choice that enters the aura for the first time on a turn or starts its turn there must succeed on a Charisma saving throw or become drained until the end of its next turn. While drained, a creature has disadvantage on attack rolls and ability checks, can’t regain hit points, and must roll a d4 and subtract the number rolled from each attack roll or saving throw it makes.