Spell Exhaustion

Using this feat will allow you to regain four levels of spells, (IE 4 1st level - 1 4th level), by taking 1 point of exhaustion. You can do this twice in one day. Using both uses of this simultaneously will allow you to regain 8 spell levels at one time; however will give you 3 points of exhaustion.

This does not work for charging items, only for the prepared spells of the caster. Unused restored spell levels do not carry over after a long rest.