Choose one creature that you can see within range that is not an undead or construct. That creature must make a Constitution saving throw. On a failed saving throw, the target takes 3d10 fire damage. On a successful saving throw, the target takes half damage.

If this damage reduces the target to 0 hit points, the fire bursts from within its body, spraying nearby foes with searing heat and flame. Each creature within 15 feet of the target must make a Dexterity saving throw. On a failed saving throw, a creature takes 3d10 fire damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage dealt increases by 1d10 for each slot level above 2nd.