Empathic Resonance

One creature you touch becomes aware of the suffering it causes. Whenever the creature injures another creature, it must make a Wisdom saving throw. If the saving throw fails, then it must subtract 1d4 from every attack roll it makes for the next five rounds before attempting another saving throw. Roll the d4 anew for every attack.

At Higher Levels. For every level above 1st, add a d4.