Temporal Shot

You touch a ranged weapon that uses ammunition, infusing it with the power of time. The next time you hit with a ranged weapon attack,  the temporal magic infused in the ammunition causes the target to be assailed by parallel timelines. The target makes a Constitution saving throw and takes an extra 5d8 piercing damage in addition to your weapon damage on a failed save and half damage on a success. 

At Higher Levels: When you use a spell slot of 4th or higher, the damage increases by 1d8 per slot level above 3rd.