Wilting Smite

The next time you hit a creature with a melee weapon attack during the spell’s duration, your weapon blackens and cracks, necrotic energies leaking fourth. Upon striking an enemy you deal 2d8 Necrotic damage, the enemy must succeed a constitution saving throw or they will not be able to heal for two rounds, making a saving throw for each to break this.

At Higher Levels. When you cast this spell using a spell slot of 3rd level spell slot or higher the enemy takes an extra 1d8 necrotic damage and the anti-healing effect lasts for three rounds.