Blasphemous Blade

Imbue a weapon with power from beyond the grave to strike you enemies.

You make a melee attack against one creature within 5 feet of you with the weapon used in the casting of the spell. On a hit, the weapon deals extra 1d6 necrotic damage, and the target cannot receive hit points until the end of the caster’s next turn.

At higher levels: the extra damage is increased by 1d6 on higher levels: 5th (2d6), 11th (3d6), 17th (4d6)