Immediately after the spell is cast, the caster abruptly explodes. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 8d6 fire damage on a failed save, or half as much damage on a successful one. The caster cannot avoid the damage from this spell by any means, though they can still resist the damage with an appropriate resistance or immunity.
The fire spreads around corners. It ignites flammable objects in the area that aren't being worn or carried.
At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 3rd.
When cast with a spell slot of 5th level or higher, the caster will be knocked unconscious even if the caster would not ordinarily be knocked unconscious. In addition the radius of the explosion will be expanded to 30-feet.
When cast with a spell slot of 7th level or higher, the caster will be killed even if the caster would not be ordinarily killed, and their body will be irretrievably destroyed. In addition the radius of the explosion will be expanded to 40-feet, with each further spell level increasing the radius by a further 10-feet.
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