Necromancy

Blindness/Deafness
Source: Player's Handbook 

 2nd-level necromancy 

 Casting Time:  1 action Range:  30 feet Components:  V Duration:  1 minute 

 You can blind or deafen a foe. Choose one creature that you can see within range to make a Constitution saving throw. If it fails, the target is either blinded or deafened (your choice) for the duration. At the end of each of its turns, the target can make a Constitution saving throw. On a success, the spell ends. 

 At Higher Levels.  When you cast this spell using a spell slot of 3rd level or higher, you can target one additional creature for each slot level above 2nd. 

 Spell Lists.   Bard ,  Cleric ,  Sorcerer ,  Wizard

Blood print
1st-level necromancy (ritual) Casting Time: 1 action Range: Touch Components: V, S, M (an ounce or more of blood) Duration: Instantaneous At your touch, wet blood on a surface shifts and reforms into a pattern of crimson blotches. This blood print is unique to the particular creature to whom the blood belongs, but you can determine the creature’s kind (such as human, gnoll, deer, or fire giant) by examining the general shape. A print can be preserved by pressing a sheet of paper against it. If this spell is cast twice, it is possible to match samples of blood originating from the same creature by comparing the prints.

Indemnify
1st-level necromancy Casting Time: 1 bonus action Range: 30 feet Components: V, S, M (a drop of blood) Duration: Concentration, up to 1 hour You fling a drop of blood at a target you can see within range, marking them for reckoning. The target must make a Constitution saving throw. On a failed save, the target takes 1d8 radiant or necrotic damage (your choice) whenever you lose hit points for the duration. This spell ends early if the target begins its turn further than 60 feet from you.