Chronal Rewind

You set an hourglass in front of a willing creature and channel temporal energy into it. The hourglass becomes temporally linked to the creature and saves their current state in time. Both begin to emanate a faint blue aura. You then flip the hourglass over after which it takes 1 round for the sand to fall, lasting until the start of your next turn.

If the target channels to much energy casting a spell of higher level then this spell, or using an ability acquired at a level higher then twice the level of this spell, the power overloads the spell shattering the hourglass and ending the spell.

At that time the creature returns to the physical state and location they were in when the spell was cast and the hourglass shatters, reverting all physical damage and restoring any used abilities and spells cast over the duration. They retain all memories,  mental conditions (ex. Charmed or frightened) and psychic damage taken. Items and gear damaged or used during this time also revert to their previous state. Magic items used during this time revert to their previous state unless deemed to be more powerful then this spell at the DM’s discretion. 

The hourglass has an AC of 15 and has 1 HP.  For the duration of the spell it is on the ground and can be destroyed. If it is, the creature is not returned to where the spell is cast and the spell ends.