Dreadful Smite

When you hit a creature with a melee weapon attack you can expend a spell slot to cast this spell. Your weapon flares with blackened shadows that seep into the targets body, and the attack deals an extra 1d8 necrotic damage to the target, forcing them to make a Constitution saving throw. On a failed save the creature is blinded, and can make the saving throw again at the beginning of each of its turns. On a successful save the creature takes half damage and is not blinded.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the initial extra damage dealt by the attack increases by 1d8 for each slot up to a maximum of 5.