Temporal Anchor

You set an imprint in time and space of a willing creature within range, As an action, record their location and hit points. while you are concentrating on this spell, as a bonus action you can return them to the point in time you imprinted them, ending the spell, their current hit points becomes the recorded value and their location becomes the recorded location. if the recorded location is occupied they are moved to the closest available location, takig 1d6 force damage for each 5 feet they have to be moved.

At the end of your turn, you have to make a concentration check to maintain the recorded imprint, where the DC is 10 + # of rounds that have elapsed since you recorded their position.