Level 5 Conjuration (Druid, Sorcerer, Wizard)
Casting Time: Action
Range: 300 feet
Components: V, S, M (a lash of dried spore-silk)
Duration: Concentration, up to 10 minutes
A swirling tempest of biting spores fills a 20-foot-radius Sphere centered on a point you can see within range. The area is Lightly Obscured and Difficult Terrain. When a creature enters the tempest for the first time on a turn or starts its turn there, it makes a Constitution saving throw, taking 4d10 Poison damage on a failed save or half as much damage on a successful one.
Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 5.