Flashing Blades

In the silence of the night, the moon holds sway over the ocean waters. In the silence of the night, the blade holds sway over the river of blood.
You set an eerie shine to your weapon, coating it with luminous shadow and causing it to inflict an additional 1d8 radiant damage. Whenever you make an attack with this weapon, your target and all hostile creatures within 5 feet of your target must make a Wisdom saving throw. If they fail, they are blinded until the end of your next turn. Once a creature has been blinded by this spell, it can’t be blinded again by this spell for one minute.