Aura of Decay

Necrotic energy radiates from you in an aura with a 30-foot radius. Until the spell ends, the aura moves with you, centered on you. This aura washes over every creature within range and all creatures must make a Constitution saving throw or take 2d8 Necrotic damage, half as much on a successful one.

Plant creatures and magical plants make the saving throw with disadvantage and the spell deals maximum damage.

Non-magical plants that aren't creatures, like trees or shrubs, they simply wither and die.

At Higher Levels. When you cast this spell using a spell slot of 1st level or higher, the damage increases by 1d8 for each slot level above 1st.