Disrupt Life

You create a swirling vortex of negative energy that ripples outward from you. When you cast this spell, you can designate any number of creatures you can see to be unaffected by it. An affected creature’s speed is halved in the area, and when the creature enters the area for the first time on a turn or starts its turn there, it must make a Wisdom saving throw. On a failed save, the creature takes 2d8 necrotic or cold damage (your choice when you cast the spell). On a successful save, the creature takes half as much damage. You can emit or suppress this aura using a bonus action. 

The chosen damage spreads around corners. 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 nonmagical plant that isn't a creature, such as a tree or shrub, it doesn't make a saving throw; it simply withers and dies. Nonmagical items not being worn or carried blacken and decay.