Time Reverse

You and up to 5 other willing creatures travel backwards in time for as long as you concentrate. All damage dealt or taken during this time is healed at the same rate, the reverse applies to any hit points regained; all creatures' age lowers by the amount of time you maintain your concentration for. Creatures of who you have not chosen to travel back with have no knowledge of the spell being cast and creatures who you did choose can remember the future you traveled back from.