Your weapon radiates terrible energy that empowers the next strike you make with it. The next time you hit with a melee weapon attack during this spell’s duration, your attack deals an extra 1d6 necrotic damage. If the target of that attack was a creature, it must make a successful Constitution saving throw or take 1d6 necrotic damage at the start of each of its turns for 1 minute, its flesh rotting around the wound. An affected creature can repeat the saving throw at the end of each of its turns, ending the effect on a success. The rotting effect also ends if the affected creature receives magical healing.