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