Alacritous Cogitation

Pulling from your vast knowledge in your spell book, you cast any spell you know of 2nd level or lower.   This process is taxing for the wizard and grants a level of exhaustion for each spell level above first.   These exhaustion levels cannot be removed by magical means.   

Casting this spell at a higher level unlocks spells of that level for this spell.   While spells of 7th level or higher can be cast, this will result in the death of the wizard via exhaustion at the end of their turn.