A burst of searing heat explodes from you, dealing 6d6 fire damage to all enemies within range. Immediately afterward, a wave of frigid cold rolls across the same area, dealing 6d6 cold damage to enemies. A creature that makes a successful Dexterity saving throw takes half the damage.
Using a Higher-Level Spell Slot. When you cast this spell using a spell slot of 8th or 9th level, the damage from both waves increases by 1d6 for each slot level above 7th.