Blood Bolt

Sacrificing some of their blood, the Blood Hunter casts a currupt magic bolt at an opponent, infecting and weakening them. The target must make a Constitution saving throw. On a failed save, the target takes 1d8 necrotic damage, and has disadvantage on the next weapon attack roll it makes before the end of its next turn. On a successful save, the target takes half damage and isn't weakened.

Upon casting, 1 necrotic damage will be done to the Blood Hunter.

At Higher Levels: The spell's damage increases by 1d8 and the damage taken increases by 1 when you reach 5th level (2d8 2 damage taken), 11th level (3d8 3 damage taken) and 17th level (4d8 4 damage taken).