Temporal Regression

Invoking the sands of time, you cause the next act of aggression or skill the target within range makes to be an ill-fated action that another version of itself has made on another time line.  

The target must succeed a Constitution saving throw. On success, the spell fails. On failure, the target must subtract 1d4 from its next attack or saving throw it makes before the end of its next turn. 

At higher Levels: the dice level increases to 1d6 at 5th level, 1d8 at 11th and 1d10 at 17th.