Demon Ice

A bright streak flashes from your pointing finger to a point you choose within range and then blossoms to create a blood red ice flower that shoot icicles and fire streaks. Each creature in a 20-footy-radius cone must make a dexterity saving throw. A target gets damaged 4d6 cold damage and 4d6 fire damage

At Higher Levels. When u cast this spell at higher levels add on d6 to cold or fire damage for on spell slot above third level