Shadow Strike

Once per turn, you can infuse the magic of the Shadowfell into your strikes with a melee weapon. On an attack, you can add 1d12 necrotic damage to the strike. If the weapon has another damage type besides bludgeoning, piercing, or slashing, the necrotic damage replaces that type for this attack.

Starting at 3rd level, the necrotic damage increases to 2d12.