Chronos Ray

A cackling beam of dark light spirals out of your outstretched finger towards your target.  If you successfully hit the target with this ranged spell attack, the target takes 3d6 Necrotic Damage.  The target must then pass a Constitution Saving throw (spell DC).  If the target succeeds on his saving throw then no additional effects are had.  If the target fails the saving throw, the target:

1. Permanently ages 2d12 months; and

2. Loses 1d4 of their highest available spell slots (the spell slots are recovered normally).

Using this spell at a higher level (5th or greater) increases the Necrotic damage dealt by 2d6 per increased spell level.