Flame Strike

You call forth a blast of searing flames to erupt from
your hand and sweep over your enemies. Each creature in a 15-foot cone must make a Dexterity saving throw. On a failed save, they take 2d6 fire damage, and on a successful save, they take half as much damage.
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 2nd.