Timetwister

You use magic to pluck the strings of time and fate, playing the most intricate piece of music ever conceived. All creatures within 120 feet of you hear painfully beautiful music, and as you finish casting the spell, you feel a rush of energy within your body. You reverse time and return it to a point just after the end of your last long rest. You and up to six creatures of your choice that you can see within 30 feet of you when you cast the spell retain memory of the events which occurred before the casting of the spell, but all other creatures lose memory of the events that have occurred since your last long rest. After casting this spell, you immediately lose one 9th level spell slot, and suffer one level of exhaustion for every 12 hours of time that are reversed.  

9th Level	Transmutation
Casting Time	1 Action (Ritual)
Range	Self
Component	Vocal	Somatic	Material (an object which you have owned for at least 24 hours)
Duration	Instantaneous
Classes	Wizard

  Timetwister