Blood Curse

You place a terrible curse upon a creature's blood.

One creature within range must make a Constitution saving throw. On a failed save, the creature becomes cursed for the duration.

Whenever the cursed creature takes weapon damage, it suffers an additional 1d6 necrotic damage.

Any magical healing received by the target is reduced by half (rounded down).

The target may repeat the saving throw at the end of each of its turns, ending the spell on a success.