Vordak's Aging Bolt

A bolt of necromantic energy shoots to a creature of your choice that you can see within range, draining youth and vitality from it. The target must make a Constitution saving throw. The target takes 2d8 necrotic damage on a failed save and ages 1 year for every 10 damage taken.  On a successful save, the creature takes half as much damage and does not age. This spell has no effect on undead or constructs.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot level above 2nd.