Blinding Necrostrike (5e Spell)
From D&D Wiki
|Casting time:||1 bonus action|
|Duration:||Concentration, up to 1 minute|
The next time you hit a creature with a melee weapon attack during this spells duration, your weapon flares with a pitch-black energy, and the attack deals an extra 2d8 necrotic damage to the target. Additionally, the target must succeed on a Constitution saving throw or be blinded until the spell ends. The creature may repeat the save at the end of each of ther turns, ending the effect on a success.
At Higher Levels. When you cast this spell at 3rd level or higher, it deals an additional 1d8 damage for every level above 2nd.