Level 3 Conjuration (Druid, Sorcerer, Warlock, Wizard)
Casting Time: Action
Range: 120 feet
Components: V, S, M (a dried deathcap gill)
Duration: Instantaneous
Toxic caps erupt from a point you choose within range and burst in a 20-foot-radius Sphere. Each creature in that area makes a Constitution saving throw, taking 4d8 Necrotic damage on a failed save or half as much damage on a successful one.
Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 3.