Aura of Decay

A diseased aura radiates from you within range. Until the spell ends, the aura moves with you, centered on you. Each hostile creature that enters the area for the first time on a turn or starts its turn within it has disadvantage on death saving throws and must make a Constitution saving throw or take 5d6 necrotic damage.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the spell’s radius increases by 15 feet for each spell slot above 4th.