Aura of Desecration (TP)

Life-defiling energy radiates from you in an aura with a 30-foot radius. Until the spell ends, the aura moves with you, centered on you. Whenever creatures of your choice enter the area for the first time on a turn or start their turn there, they must make a Constitution saving throw. On a failed save, a creature takes 4d6 necrotic damage and can't regain hit points until the start of their next turn. On a successful save, a creature takes half as much damage and suffers no other effect.