Dr. Draco's Time Manipulation Aura

You create a 10 ft. sphere centered on a point within range. The sphere's radius is not hindered in any way by any non-magical physical objects. The sphere is not visible and the area within it is considered difficult terrain. Any creature that ends its turn in the radius must make a Wisdom saving throw, aging 1d4 + 1 years on a fail, or half as much on a success. For every slot level above 5th that you cast this spell with, an additional two years is added to how much the creature ages.