Temporal Regression

When you cast this spell note, your current location and condition, including your hit point total and any ongoing conditions affecting you, as well as their durations (poisoned, damage, and spell effects). This spell creates a beacon in space time thats invisible to everybody but you
While you are within 90 ft. of where you originally cast the spell and as long as the spell's duration isn't up, you can use an action to trigger the spell, returning yourself to your previous state and condition you were in when you cast the spell. This, however, does not replenish and expended items/charges, abilities, or spells you may have used during that time. 
This spell also does not reverse effect for anyone else, and to bystanders, it appears as though you teleported to the beacon's location and regained the conditions you had when it was set. Additionally, temporal regression strains you body: when the spell is triggered, you gain 1 level of exhaustion. This exhaustion disappears after 24 hours.
You can trigger the spell as a reaction instead, but doing so consumes the material component. 

Credit to reddit user u/Hastek01