Temporal Erosion

You create a field of unstable time magic that erodes the fabric of reality, causing creatures and objects within the area of effect to suffer the effects of rapid aging.

The spell affects all creatures within a 10-foot radius sphere centered on a point the caster chooses within range. When a creature enters the affected area for the first time on a turn or starts its turn there, the creature must make a Constitution saving throw. On a failed save, a target takes 2d6 necrotic damage and their speed is halved until the beginning of its next turn. On a successful save, the creature takes half damage, but suffers no other effect. 

A nonmagical object that isn't being worn or carried also takes the damage if it's in the spell's area.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d6 and the area radius increases by 5 feet for every two slot levels above 3rd.