Spark of the Ancient Warrior

You have been granted a spark of an ancient warrior and your deeds remind others of their stories and legends from long ago. As a reaction to hitting an enemy with an attack on your turn, choose up to three creatures within 30 feet of you that saw the attack. Until the end of your next turn, whenever one of those creatures makes an attack role or saving throw. They can roll 1d4 and add the number rolled to the attack roll or saving throw.