Bursts of Frostfire

You envision three points within range that you can see. Each point explodes into an burst of flame and cold. Each creature in a 10-foot-radius sphere centered on each point must make a Dexterity saving throw. A target takes 5d6 fire damage and 5d6 cold damage on a failed save, or half as much damage on a successful one.

Each creature can only be affected once by a casting of this spell. The explosions spreads around corners.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the fire and cold damage each increase by 1d6 for each slot level above 4th.