Black Fireball

5-level Evocation

A maelstrom of swirling black fire appears near you hands. On your next turn, you choose a spot within range as an action, provided this spell hasn’t ended. The maelstrom disappears from your hands and reappears centered on that point, grown exponentially. Each creature in a 30 foot radius sphere centered on that point must make a Dexterity saving throw. A target takes 6d6 fire and 6d6 necrotic damage on a failed save or half as much damage on a successful one.   The maelstrom spreads around corners. It ignites flammable objects in the area that aren’t in the area that aren’t being worn or carried, and it withers nonmagical plants.
At higher levels: When you cast this spell using a spell slot of 6th level or higher, the fire damage or the necrotic damage (your choice) increases by 1d6 for each slot level above 5th.