Blood Curse: Blunted Reflexes

When you hit with a weapon attack, you can thicken the blood in your opponent’s veins, slowing their reaction time. Until the end of your next turn, the target can’t take reactions and every time it makes a Dexterity saving throw or ability check it must roll a d4 and subtract that roll from the save or check.

Amplify. The target has disadvantage on their next Dexterity saving throw and is unable to take reactions for 1 minute. At the end of each of their turns they can make a Constitution saving throw against this curse, ending it on a success.