Blood Blight

Use your blood magic to create a blood red necromantic ball of energy to hit any creature of your choice that you can see within the spells range, draining moisture and vitality from it. The target must make a Constitution saving throw. The target takes 8d8 necrotic damage on a failed save, or half as much damage on a successful one, and granting you ½ the damage as temporary health.  
This spell has no effect on undead creatures..
If you target a plant creature or a magical plant, it makes the saving throw with disadvantage, and the spell deals maximum damage to it.
If you target a non magical plant that isn't a creature, such as a tree or shrub, it doesn't make a saving throw; it simply withers and dies.
At Higher Levels. Casting this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.