Blight

The target must make a Con save, taking 8d8
necrotic damage on a failed save, or half as much
damage on a success. This spell has no effect on
undead or constructs. If you target a plant
creature or a magical plant, it makes the save with
disadvantage, and the spell deals max damage. If
you target a nonmagical plant that isn't a creature,
it doesn't make a saving throw; it simply dies.
At Higher Levels. When you cast this spell using
a spell slot of 5th level or higher, the damage
incre