Chronal Repitition

You loop the threads of time to repeat the damage of a single strike to the target. When casting the spell you target a single creature and force them to make a dexterity saving throw. On a failed save choose a single instance of damage dealt to it within the past two rounds of combat and reroll all dice used on that attack if the target sucseeds the damage is halved.

If the damage dealt required the use of a spell slot you must match the level of the highest slot used to duplicate the damage. Example if a paladin uses thunderous smite and a fourth level divine smite you must cast this spell at fourth level.