Time's Gambit

You tear a hole in the fabric of time, calling forth arcane energy at the cost of your own life force.  Instead of expending a spell slot, you regain expended spell slots with a combined total of the level at which you cast this spell.  In doing so, you make a Constitution saving throw against your spell save DC, taking 6d8 necrotic damage (ignores resistance and immunity) on a fail, and half on a success.  Either way you age by one month.  If the damage caused would kill you, you may let the spell fail taking no damage and ending your action.  If the spell fails in this way, you age twice the amount given for the level at which you cast this spell.

At Higher Levels: The damage you take increases by 2d8 per level above 3rd.  Additionally, you age more by casting this spell at higher levels: 6 months at 5th level, 1 year at 7th level, and 10 years at 9th level.