Vengeful strike

As a reaction when an enemy creature hits you with an attack, you can charge your weapon with your spite. The next time you hit that same enemy with a weapon attack, add 2d6 force damage to the damage total. The spell ends early if you target a different creature with an attack, or if your targeted creature dies.

At higher levels: at higher levels, increase the damage added by 1d6 for each level above first.